I can see that Tucker has some redness and hair loss on the top of his paw. This can be a skin infection or caused by certain types of cancers and wounds. It is definitely best to have this seen by a vet as soon as possible. In the meantime, an E-collar or “cone” can prevent Tucker from licking the area and making it more severe. I hope all is well and thank you for using Petco Pet Education Center, formerly Petcoach!