I am new here, but scared to death. My 6 week old developed a lump on his right front knee area aout a week ago, I have been watching it and it started to swell over the weekend. I shaved around it and there is no punctures or tears in skin, but it is red and very warm to the touch. It is the size of a quarter tonight, I was holding him giving him some TLC and noticed two other lumps are comming around the other jonts on two other legs in the same knee area. Eating and Pottying fine, no fever. He is walking slowly, and limping, areas are tender to the touch. He has not had his shots yet.