Recognizing Pain in Senior Dogs
Dogs show pain differently than humans. The most reliable indicators of chronic pain: reluctance to climb stairs or jump onto furniture, slowing down on walks or refusing to go as far, difficulty standing from a lying position, limping or favoring one side, decreased interest in play or interaction, changes in sleeping patterns, and irritability when touched in specific areas.
The Grimace Scale for dogs (GPSS) evaluates facial expressions for pain: ear position (ears pulled back), orbital tightening (squinting), muzzle tension, and whiskers pulled forward. This is used in research settings but the principles apply to home observation. A dog that looks "relaxed" with slack facial muscles is less likely to be in pain than one with tight muzzle muscles and pulled-back ears.
Acute pain (sudden, sharp pain from injury or surgery) is easier to recognize: vocalization, guarding a body part, sudden limping. Chronic pain (osteoarthritis, cancer, chronic ear infections) is insidious — the dog adjusts its behavior gradually until the owner realizes the dog is no longer doing things they used to do.
NSAIDs: The First-Line Pharmaceutical
NSAIDs are the most effective pharmaceutical class for musculoskeletal pain in dogs. They reduce inflammation at the source by inhibiting cyclooxygenase (COX) enzymes. Carprofen, meloxicam, deracoxib, and firocoxib are the commonly prescribed veterinary NSAIDs. Each dog responds differently — if one NSAID is inadequate, switching to another sometimes produces better results.
NSAIDs require baseline bloodwork before starting (to establish kidney and liver function baselines) and periodic monitoring. The risks: gastrointestinal ulceration (the most common serious side effect), hepatotoxicity (rare but documented), and kidney damage with chronic use or dehydration. The benefits for a dog with arthritis almost always outweigh the risks when monitored properly.
NSAIDs should not be combined with corticosteroids (prednisone) — the combination dramatically increases GI ulceration risk. They should be given with food to reduce GI irritation.
Other Pharmaceutical Options
Gabapentin: modulates calcium channels in the central nervous system, reducing neuropathic pain and wind-up pain (pain amplification in chronic pain states). Particularly useful for pain from nerve compression, cancer, and as an adjunct to NSAIDs for arthritis. Often combined with NSAIDs when NSAIDs alone are insufficient. Sedation is a common side effect, especially at higher doses.
Tramadol: a weak opioid that also inhibits serotonin and norepinephrine reuptake. Provides mild to moderate analgesia. Controversial as a sole analgesic for moderate to severe pain — evidence for efficacy in dogs is mixed. Useful as an adjunct to NSAIDs or gabapentin. Should not be used in dogs on SSRIs or with seizure history.
Buprenorphine: a partial mu-opioid agonist. Used sublingually for breakthrough pain and for pre-emptive analgesia. Short-acting. Useful for acute pain flares in dogs with chronic pain.
Amantadine: an NMDA receptor antagonist. Used for chronic, refractory pain — particularly cancer pain and severe osteoarthritis. Works synergistically with NSAIDs and gabapentin. Requires 2–3 weeks to reach full effect.
Supplements and Complementary Therapies
Omega-3 fatty acids (EPA and DHA): the most evidence-supported supplement for canine arthritis pain. At 75–100mg/kg/day, EPA and DHA reduce inflammatory prostaglandin production and measurably improve mobility scores in arthritic dogs. Fish body oil (salmon, sardine, anchovy) is the source — flaxseed provides plant-based omega-3 that dogs convert inefficiently. Effective within 4–6 weeks.
Glucosamine and chondroitin: controversial efficacy. Studies show mixed results. A reasonable trial of 8–12 weeks with a NASC-certified product is appropriate. If no improvement after the trial period, discontinue.
CBD oil: evidence is accumulating but still preliminary. Some dogs show improvement in pain-related behavior. Quality control of commercial CBD products is inconsistent — use products specifically formulated for dogs from reputable manufacturers. Start at the lowest dose and titrate up.
Physical Medicine and Rehabilitation
Physical therapy is one of the most effective interventions for chronic musculoskeletal pain. A veterinary rehabilitation specialist can develop a plan that includes: underwater treadmill therapy (reduces joint load while maintaining muscle), therapeutic laser (reduces inflammation and pain at the joint level), acupuncture (releases endogenous opioids and reduces pain signaling), and targeted exercise programs.
Massage: gentle myofascial release techniques improve circulation and reduce muscle tension that compensates for joint pain. Learning basic dog massage (slow strokes, gentle pressure along muscle fibers) is a practical skill owners can use at home.
Heat therapy: applying warmth to stiff, painful joints before exercise increases blood flow and reduces stiffness. A microwavable heating pad or hot water bottle wrapped in a towel (never apply direct heat to skin) for 10–15 minutes before a walk.
The Multimodal Approach
No single intervention manages chronic pain optimally. The evidence-based multimodal approach combines: NSAIDs for baseline inflammatory control, gabapentin for neuropathic and wind-up pain components, omega-3 supplementation, physical therapy, and environmental modifications (non-slip surfaces, ramps, orthopedic bedding).
The goal is not zero pain — it is the lowest pain level at which the dog can have good quality of life. Some pain is acceptable if the dog is engaged, eating, sleeping well, and doing the activities they enjoy.