My senior Chihuahua is limping. Should he take joint supplements?

Hello and thank you for reaching out to Petco Pet Education Center, formerly Petcoach. If Poncho is lame in one of his legs, he could have an injury ranging from a problem with his toes to something in his shoulder (front leg) or his hips (hind leg). If this is a chronic issue, it is possible Poncho has some arthritis in his joints, which may benefit from a joint supplement. However, if Poncho has a soft tissue injury or something like a fracture or dislocation of any of his bones or joints, a supplement will not help. I recommend restricting Poncho's activity for 3-5 days and see if this helps his lameness. If he is no longer limping on the leg after this rest, this may have just been a soft tissue injury that needed time to heal. If his lameness does not improve or worsens over this time, I recommend having Poncho seen by a veterinarian. He/she can perform a full physical exam and orthopedic exam to localize his pain and determine the best course of treatment. As a reminder, NEVER give dogs pain medication that is intended for humans, as these can be fatally toxic to dogs. I hope this is helpful!