2. Sudden or gradual reluctance to play.
Dogs want to play with other members of the household, animal or human, throughout their entire lives. Suddenly not wanting to engage in these activities could indicate they are in pain. If you have ever had a sore shoulder or carpal tunnel syndrome, then you know exactly how you can move those joints without causing undo pain. If someone greets you and aggressively shakes you hand, the pain can be excruciating. So it is with some of our dogs’ favorite games or when interacting with other dogs.