What are some typical signs of arthritis in dogs?

Stiffness and difficulty climbing stairs are indeed typical signs of arthritis in dogs. Arthritis is a degenerative joint disease that can lead to inflammation, pain, and decreased mobility. As the condition progresses, dogs may show stiffness, especially after resting or in cold weather, making activities such as climbing stairs or getting up from a lying position challenging.

In addition to stiffness, you might notice changes in their behavior like reluctance to engage in physical activities they previously enjoyed, such as walking or playing, due to discomfort in their joints. This choice reflects common physical manifestations of arthritis in dogs, making it the right answer.

The other options describe symptoms that are not characteristic of arthritis. For instance, increased appetite and thirst usually indicate other underlying medical issues, bright fur and increased playfulness do not logically connect to joint pain, and frequent barking and jumping could be linked to behavioral issues rather than a physical condition like arthritis.