Arthritis develops gradually, so its earliest signs in a dog are easy to dismiss as simply getting older. The classic pattern is stiffness after rest: a dog who rises slowly from his bed, takes a few careful steps, and then loosens up as he moves. Unlike a sudden limp from an injury, arthritic discomfort tends to be worse in the morning, worse in cold or damp weather, and worse the day after unusually long exercise, and it involves the same joints in a repeating pattern rather than appearing in a new place each time.
Movement changes that point to sore joints
Watch how he handles the transitions he used to do without thinking. Hesitating at the bottom of stairs, asking to be lifted into the car, slipping on smooth floors, or choosing to stay downstairs are all meaningful. On walks, look for a shortened stride, a bunny-hopping motion with both back legs moving together, swaying hips, or a head bob that shifts weight off a sore front leg. At home, a dog may stop following you from room to room, take longer to lie down, circle repeatedly before settling, or get up and resettle several times in the evening because no position stays comfortable for long.
Subtler signs in grooming, mood, and muscle
Pain changes more than gait. A dog with sore hips or elbows may snap or pull away when that area is brushed, bathed, or dried, even though he tolerated it before. Licking repeatedly at one joint, chewing at a wrist or hock, and sleeping in a new position that keeps a leg extended are quieter clues. Over months, the muscles over a painful joint often shrink because he is using that leg less, so one thigh may look thinner than the other. Appetite usually stays normal, which is why owners sometimes miss how much else has shifted until they compare this month with last.
What to track before you talk to your veterinarian
For two or three weeks, note which specific activities are harder: stairs, jumping, rising, walking distance, playing, or getting onto furniture. Record whether stiffness is worst after sleep, after exercise, or in particular weather, and how long morning stiffness takes to ease. A short phone video of him rising from rest and walking away from you is especially useful, because many dogs move more freely at the clinic than they do at home. Avoid starting, stopping, or sharing any pain medication on your own — what is safe for people or for another dog may not be safe for yours, and your veterinarian needs an honest picture of his untreated baseline.
When stiffness deserves a prompt appointment
Book an appointment rather than waiting for a routine visit if he stops bearing weight on a leg, cries out when rising, falls on stairs, loses bladder control, or suddenly becomes much worse over days rather than months. A rapid change can mean something other than ordinary joint wear, such as an injury or a problem in the spine, and it should not be folded into an arthritis assumption. Puppies and young adults with persistent stiffness also need assessment, because their causes are different from those in an older dog.
Turning observations into a mobility history
Arthritis management works best when it is adjusted over time, and that adjustment depends on knowing whether walks are getting shorter, stairs harder, or mornings easier than they were before. A dated record turns impressions into evidence you can review together at each visit. Keeping those mobility notes, videos, and visit summaries together in KinsLe's Pet Passport means every veterinarian who sees your dog can follow how his joints have changed, not just how he happens to move that day.