Hi. I have a 9yo male greyhound named Blu. On Saturday he began to limp on his back right leg. He had a good size corn on that foot. I removed it like I have always been. I thought this would improve the limp. On Sunday he still limped, I attribute it to the fact that he had a hole in his foot. Since then the limp has gotten better and then not, improved and then there it was again. He's acting like his normal crazy self except there is a limp. He's jumping and zooming around but limps on hard floors. I have manipulated the leg and paw all the way up into the hip and I get nothing. Today I noticed that his paw is slightly swollen, the area wear there is fur right behind the digital pad. (Could I have injured the pad during corn removal? Was it not the corn that was bothering him and there was another reason for the limp?) He gives me a side eye and pulls his foot away when I poke around. He doesn't like it but nothing vocal or dramatic. What do we think? He is our third greyhound. My first baby Mumbo passed away at 9 from bone cancer. It all started with the dreaded limp. Although his limp was way more serious and he needed to be carried to the car for the vet trip. I literally get lightheaded when I think about Blu having cancer. What do we think?