my water dragon has a bum leg...I think.

[Jeebus]

I need some help from people with WD's. Mine is a green water dragon that appears to have a gimpy leg...but I'm not sure which one is really the gimped leg.

I have some pics of his hind quarters:



and:



I first though his right leg has become swollen...but his frontal limbs seem to have the same rounded edge, where his left looks very boney...I'm not sure what caused it...I was thinking maybe he jumped off one of his vines and fudged the landing...any help I can get will be greatly appreciated