Summer Activity and Hydrotherapy for Senior Dog Patients: A Veterinary Guide
- Dr. Monica Tarantino
- Jul 1
- 12 min read
Summer changes the conversation around senior dog activity in a specific way. Clients who have been cautious about exercise through the colder months start asking about swimming, about lakes and ponds, about hydrotherapy referrals, and about how much their arthritic dog can safely do now that the weather has improved. These are good questions and they deserve good answers. The problem is that most of those answers require nuance that a general "swimming is great for arthritic dogs" response does not provide.
Hydrotherapy for senior dogs occupies a distinct clinical space. Underwater treadmill therapy and pool-based aquatic rehabilitation are therapeutic interventions that, when applied to the right patient by trained rehabilitation professionals, produce meaningful improvements in strength, range of motion, and function. They are also interventions that are contraindicated in certain patients, that carry comorbidity-specific considerations your team needs to understand before recommending or referring, and that do not encompass most of what clients mean when they ask about swimming.
This post is written for the veterinary team fielding these questions. It covers the physiology of how hydrotherapy benefits the aging musculoskeletal system, when it is appropriate and when it is not, what the comorbidity landscape looks like for a typical senior patient, how to make the rehabilitation referral efficiently, and how to have a productive summer activity conversation with a client whose senior dog is doing better than expected in the warm months. That last conversation, the one with the client who is excited that their dog seems more mobile, is one of the most clinically important of the summer season.
Key Takeaways
Aquatic rehabilitation including underwater treadmill therapy reduces joint loading while allowing meaningful muscle strengthening and range of motion work, making it particularly valuable for senior dogs with OA or post-orthopedic-surgery rehabilitation needs.
Hydrotherapy is contraindicated in patients with open wounds, active skin or ear infections, uncontrolled cardiac disease, significant respiratory compromise, and uncontrolled seizures. A thorough clinical review is essential before referral.
Comorbidities common in senior patients, including CKD, cardiac disease, and obesity, do not necessarily preclude hydrotherapy but require communication with the rehabilitation specialist before the program begins.
Summer swimming in natural water is different from supervised aquatic rehabilitation. Client guidance should address both the therapeutic and recreational contexts.
The summer visit is an opportunity to assess activity level changes, adjust management plans to account for increased summer activity, and proactively address the comorbidities that make summer higher-risk for some patients.
Table of Contents
What Aquatic Therapy Does for the Aging Canine Body
The clinical value of aquatic therapy for senior dogs rests on a physiological principle that is straightforward but consequential: water reduces the load on weight-bearing joints while preserving the mechanical demands of muscle contraction and movement. For a dog with osteoarthritis, the barrier to therapeutic exercise on land is that the movement required to strengthen supporting musculature is also painful enough to be avoided. Aquatic therapy changes that equation.
In an underwater treadmill, the buoyancy of water at chest height reduces effective body weight by approximately 40-50%. The dog walks on the treadmill with substantially reduced joint loading, which allows a range of motion and muscle engagement that many OA patients cannot achieve on land without significant pain. Over a series of sessions, the therapeutic goal is to strengthen the periarticular musculature that supports the compromised joint, improve range of motion, and rebuild proprioceptive function that deteriorates with reduced activity and pain avoidance. The result, in appropriate patients who complete a structured rehabilitation program, is typically improved gait quality, increased activity tolerance, and owner-reported improvement in quality of life.
Pool-based hydrotherapy, where the dog swims rather than walks on a submerged treadmill, provides cardiovascular conditioning and upper body musculature work that is distinct from underwater treadmill work. Swimming also provides benefit for joint range of motion. It is less precisely controllable as a rehabilitation tool than the underwater treadmill, where resistance, water height, and belt speed can all be adjusted, but it is beneficial for appropriate patients and more accessible in some geographic areas where underwater treadmill facilities are not available.
Beyond OA, aquatic rehabilitation is used for neurological patients recovering from intervertebral disc disease, patients in post-surgical recovery from orthopedic procedures, and patients with degenerative myelopathy who retain some hindlimb function. For the senior patient population that presents in general practice, OA is the most common indication, but the rehabilitation specialist's scope is broader than that.
When Hydrotherapy Is Appropriate for Senior Dog Patients
Aquatic rehabilitation is most clearly indicated for senior dogs with osteoarthritis who have not achieved adequate pain control and functional improvement with medical management alone, or for patients where medical management is limited by comorbidities. It is also indicated for any senior patient post-orthopedic surgery as part of structured recovery, and for patients with neurological conditions where maintaining musculature and range of motion has functional quality-of-life implications.
Within the OA population, the patients most likely to benefit clearly from aquatic rehabilitation are: those with moderate to severe functional limitation, those where body weight is a significant contributor to pain burden (since weight reduction combined with rehabilitation produces better outcomes than either alone), and those whose owners are motivated and able to commit to a rehabilitation schedule. Aquatic rehabilitation is time-intensive for clients, and the therapeutic benefit depends on consistent attendance over a course of treatment. An unmotivated client or a schedule that makes attendance difficult will produce incomplete results.
From a timing perspective, summer is a natural window for initiating aquatic rehabilitation referrals for several reasons. Clients are thinking about activity. Warmer weather has often made the dog's mobility more visible, either because the dog is more active and comfortable or because summer activities are highlighting limitations the owner had not previously confronted. The client who watches their dog struggle to get out of the car for a summer hike is in a different headspace about intervention than the same client during a February wellness visit.
Patients in good systemic health with primary musculoskeletal or neurological indications for aquatic therapy can generally be referred to a certified canine rehabilitation practitioner with a clear summary of their comorbidities, current medications, and treatment goals. The American Association of Rehabilitation Veterinarians maintains a directory to help locate a canine rehabilitation practitioner for referral.
Contraindications and Comorbidities That Require Clinical Caution
Several conditions represent contraindications to aquatic therapy that should be screened before referral. Open wounds or recent surgical incisions that have not fully healed are absolute contraindications to pool and underwater treadmill work, for obvious infection risk reasons. Active skin infections, particularly pyoderma affecting large surface areas, are contraindicated both for the patient and to protect other patients using the facility. Active ear infections are a relative contraindication for pool swimming, where water immersion to the head is typical, though underwater treadmill work where the head remains above water may still be possible.
Uncontrolled cardiac disease is a contraindication to aquatic therapy. The hydrostatic pressure of water, particularly at chest depth, increases venous return and cardiac preload. In a dog with well-compensated cardiac disease this may be manageable with appropriate monitoring and program design, but in a patient with unstable or decompensated cardiac disease, aquatic therapy should not be initiated until cardiac status is controlled. This is a clinically significant point for the senior patient population, where MMVD is common. A dog at Stage B2 or C of MMVD being managed medically can potentially participate in appropriately designed aquatic rehabilitation with good communication between the general practitioner and the rehabilitation specialist. A dog at Stage C with recent onset of decompensation should not.
Significant respiratory compromise, including advanced tracheal collapse or severe bronchopulmonary disease, is a contraindication because of the additional respiratory work associated with water resistance and hydrostatic pressure. Uncontrolled seizures are an obvious contraindication to any aquatic setting for safety reasons.
For patients with CKD, obesity, or hypothyroidism, aquatic rehabilitation is not contraindicated but requires awareness. The referring veterinarian should communicate these conditions to the rehabilitation specialist so the program can be designed to account for them. A renally compromised patient may have reduced exercise tolerance and may need more gradual progression. An obese patient may be at higher heat risk and may need modified session length and cooling attention. These are problems that rehabilitation practitioners are experienced in managing, and a brief, specific referral letter including relevant comorbidities and current medications gives them what they need to proceed safely.
Summer Activity Recommendations for Senior Dogs Beyond Hydrotherapy
Most clients who ask about swimming this summer are not asking about underwater treadmill therapy. They are asking whether their dog can swim in the lake, paddle in the backyard pool, or accompany them on water-adjacent summer activities. These are different questions, and the answers are clinically different from the aquatic rehabilitation discussion.
Natural water swimming for senior dogs is generally beneficial for those without significant cardiac, respiratory, or orthopedic contraindications, with some specific caveats. Ear care after swimming is more important in senior dogs who are more prone to otitis, particularly in floppy-eared breeds. Clients should be advised to dry ears after swimming and to watch for signs of early otitis. Entry and exit points matter for senior dogs with OA or neurological compromise. Rocky, steep, or unstable entry points to natural water can produce acute injuries in patients who are managing well in other contexts. Gradual, sandy entry is far preferable.
Summer land activity for senior dogs warrants specific guidance around heat, timing, and surface temperature. Exercise during peak heat hours (typically 10 a.m. to 4 p.m.) is inadvisable for senior patients, most of whom have reduced thermoregulatory capacity compared to younger adults. Asphalt temperature during these hours can exceed 150°F in direct sun, causing paw pad burns in dogs who are walked on it. Early morning and evening walks are the appropriate recommendation. Hydration reminders are especially relevant for senior patients, who have reduced thirst drive compared to younger dogs and may not self-regulate fluid intake adequately during warm weather activity.
How to Make an Effective Rehabilitation Referral
Aquatic rehabilitation is a specialty area of veterinary medicine. Certified Canine Rehabilitation Practitioners (CCRPs) complete structured training programs, typically through the University of Tennessee's Canine Physical Rehabilitation program or the Canine Rehabilitation Institute, and practice under the supervision of a licensed veterinarian or as licensed veterinarians themselves. The University of Tennessee's Canine Rehabilitation Certificate Program is a primary training pathway for certified canine rehabilitation practitioners in North America.
An effective rehabilitation referral communicates three things clearly: what the patient's primary condition is and what functional goals the rehabilitation program should target, what relevant comorbidities and medications the rehabilitation team needs to know about, and what level of communication the referring practice wants regarding the patient's progress. The last point is underemphasized but important: a rehabilitation team that knows the referring practice wants updates after each assessment phase will communicate differently than one that assumes silence means satisfaction.
In the referral letter, be specific about functional limitations. "OA with difficulty rising from rest and reduced hindlimb extension" gives the rehabilitation practitioner more actionable information than "arthritis." Note the HCPI or CBPI score if you have one. Specify current NSAID and adjunctive medications and the most recent bloodwork date. Flag any cardiac, renal, or respiratory comorbidities explicitly.
The Summer Activity Conversation With Senior Dog Owners
The clients who come in excited that their senior dog seems to be doing better this summer deserve a response that validates their observation, explains the clinical context, and uses the moment to do some productive clinical work.
The improvement is often real. Warmer ambient temperatures reduce joint stiffness in OA patients. Reduced exercise on cold, slippery indoor surfaces reduces pain-provoking activity. Longer daylight hours and more outdoor time may improve mood and activity in dogs with early CCDS. The summer improvement is a good thing and should be named as such.
It is also a clinical opportunity. A client who says "she's doing so much better than she was in February" is a client who is paying close attention to their dog. That attention is an asset. The summer visit, framed as a senior-specific check-in rather than a routine wellness appointment, can include a current pain score that documents the baseline before increased summer activity, a reassessment of management plans in light of the patient's functional improvement, and a proactive conversation about what to watch for if activity level increases significantly. A dog who is better is not a dog who can suddenly do everything she could at 5 years old, and helping the client understand the appropriate calibration of summer activity prevents the weekend hike injury that undoes months of careful management.
Conclusion
Hydrotherapy and summer activity questions are clinical encounters, not lifestyle questions. The senior dog owner asking about swimming this summer is giving you a chance to assess their dog's functional status, review the current management plan, adjust as needed, and either initiate a rehabilitation referral or provide specific guidance on recreational activity. Done well, it is one of the more productive conversations of the summer season.
The clinical framework for these conversations, including rehabilitation referral criteria, comorbidity screening, activity guidance, and the summer senior visit structure, is part of what differentiates a practice with a senior care program from one without one. Senior dog owners who receive specific, knowledgeable guidance from their veterinary team about summer activity remember that their practice takes their dog's senior years seriously. That is the kind of clinical interaction that builds lasting client relationships.
Frequently Asked Questions
Q: Is hydrotherapy safe for senior dogs with arthritis?
For most senior dogs with osteoarthritis and no significant cardiac, respiratory, or skin contraindications, aquatic rehabilitation is not only safe but is one of the most effective therapeutic interventions available for improving strength, range of motion, and functional quality of life. The water buoyancy that reduces joint loading is precisely what makes it valuable for dogs whose OA pain limits their ability to exercise effectively on land. The key prerequisites are a clinical assessment to identify and communicate relevant comorbidities before the program begins, referral to a trained canine rehabilitation practitioner rather than unstructured recreational swimming as a therapeutic intervention, and a realistic expectation from the client that aquatic rehabilitation is a program with a schedule and progression, not a one-time treatment. Senior dogs with well-compensated cardiac disease, chronic kidney disease, or hypothyroidism can generally participate in aquatic rehabilitation with appropriate communication between the general practice team and the rehabilitation specialist, so that the program is designed around the patient's specific health status.
Q: How is underwater treadmill therapy different from letting my dog swim?
Underwater treadmill therapy is a structured rehabilitation intervention conducted in a facility with a trained rehabilitation practitioner monitoring the session. The water height, treadmill belt speed, session duration, and progression over time are all controlled variables that are adjusted based on the patient's response and therapeutic goals. This precision is what produces the clinical outcomes that aquatic rehabilitation research has documented. Recreational swimming, whether in a pool, lake, or natural body of water, is a form of exercise rather than a therapeutic intervention. It provides some of the same benefits, including reduced joint loading, cardiovascular conditioning, and range of motion work, but without the precision, monitoring, or structured progression of a formal rehabilitation program. For a dog with moderate to severe OA or a specific rehabilitation need following surgery or neurological illness, the structure of a formal program is clinically important. For a senior dog in reasonable health whose owner wants to include swimming as part of a summer exercise routine, recreational swimming is a good activity choice with appropriate precautions for entry, exit, ear care, and heat management.
Q: When should I refer a senior dog to a canine rehabilitation practitioner?
Referral to a canine rehabilitation practitioner is appropriate for senior dogs with osteoarthritis whose functional limitation is not adequately addressed by medical management alone, for post-operative rehabilitation following any orthopedic or spinal surgery, and for patients with neurological conditions including degenerative myelopathy where maintaining musculature and mobility has quality-of-life implications. The timing of referral matters. Earlier referral in the OA management course, before the patient has developed significant disuse atrophy, tends to produce better rehabilitation outcomes than late referral after muscle mass has been substantially lost. Post-surgical referral should typically be initiated within two to four weeks of surgery, depending on the procedure and the surgeon's protocol. For neurological patients, the window for meaningful rehabilitation benefit depends heavily on the degree of functional capacity remaining, making early assessment important. Certified canine rehabilitation practitioners can be found through the University of Tennessee's Canine Rehabilitation practitioner directory and the Canine Rehabilitation Institute's graduate directory.
Q: What should senior dog owners know about summer exercise safety?
Senior dog owners should understand three primary summer exercise considerations for their aging pets. First, timing matters more than total exercise volume: exercise during the coolest parts of the day, typically before 9 a.m. or after 6 p.m., reduces heat exposure risk substantially, and asphalt and pavement surfaces during peak heat hours can reach temperatures that cause paw pad burns before the dog shows obvious distress. Second, senior dogs have reduced thirst drive compared to younger animals and may not drink enough to maintain adequate hydration during warm weather activity; owners should offer water proactively before, during, and after exercise rather than waiting for the dog to signal thirst. Third, activity increases during summer that exceed what the dog has been doing through the winter can cause acute pain flare-ups in dogs with managed OA even when the dog appears willing to do more; the appropriate guide for summer activity increase is gradual escalation with monitoring for lameness, stiffness after rest, and reluctance to engage in activities the dog initiated the day before.
Q: How can my veterinarian help me build a summer activity plan for my senior dog?
A veterinary team with a senior care program can build a summer activity plan that accounts for the specific health status of the individual patient rather than providing general advice that may or may not apply. That plan should address the patient's current pain status using a validated pain assessment tool, identify any comorbidities that affect summer activity tolerance such as cardiac or respiratory disease, and provide specific guidance on activity type, duration, timing, and monitoring for warning signs. For patients who are candidates for aquatic rehabilitation, the summer visit is a natural time to initiate that referral with a structured handoff to the rehabilitation team. For patients who are not candidates for formal rehabilitation but whose owners want specific summer activity guidance, a veterinarian trained in senior patient care can provide calibrated recommendations that balance the genuine benefits of warm-weather activity against the real risks of over-exertion in a compromised patient. The Senior Dog Veterinary Society's certification curriculum includes the clinical frameworks for summer senior care that make these conversations specific, accurate, and useful to clients.
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