You may notice that your dog is reluctant to do things that previously were not a problem for them. Perhaps your pet used to dart into your vehicle the second the doors opened, and now seems indifferent. You may notice your dog has difficulty going up or down the stairs. Is your once playful pet no longer interested in running and playing? Maybe lagging behind on walks? If you notice these changes in your pet, arthritis could be the culprit. Chances are, these once easy tasks are now painful due to swollen joints. Depending on the joints that are affected, you may see your pet limping or favoring one or more legs over the others. Your dog may seem to experience pain or stiffness when getting up or down that seems to resolve after they have walked a bit and warmed up. Inflammation in the joints can cause the affected areas to be sensitive to touch. Has your once lovely pup seemed to turn into a grumpy old man? If you were in constant pain when moving, it is likely you would have a shorter fuse, too. They may snap or bite when someone tries to touch them, particularly if you are handling them in a way that worsens the pain. Your pet may spend more time in quiet areas of the house, or stop following you around. Pain is exhausting! If it is uncomfortable for your pet to move around, they will not want to walk as far or play. Instead they may spend more time resting or sleeping. You may notice them licking or chewing on or more spots often, even to the point of hair loss and inflamed skin in the area. Arthritic dogs often develop muscle atrophy from inactivity. The decreased use of certain muscles will cause them to deteriorate over time. If the arthritis is in one or more legs, you may notice that those legs look thinner than the others.