My boy has a swollen right front foot. It looks like the third toe is swollen the most. He's limping plus he's licking it like crazy. He's also licking farther up his leg a little bit. I can't see any obvious wounds or bite marks or splinters, etc. He's been licking it a little the past few days but that's not really unusual. Late this afternoon is when he started limping and I noticed the swelling a couple of hours ago. The swelling has not gotten any worse. I am taking him to the vet tomorrow, but does anyone have any idea what it may be or has anyone else's dog had this issue before? Thanks in advance.