He limped couple of times and then immediately kept walking but I could tell he was swining his leg weird. I started massaging his knee and then he started to stretch his leg on his own. I did not notice any popping or swelling. Then again because of his color it's hard to really see anything. The epson salt sounds like a great idea. What temperature do you recomend for the water? the odd thing is he has limped like this before and then it went away but I am just annoyed to see this happening again now that he is leaner and in better shape :(