We have recently rescued a 5 yo QH Gelding named Tuff. The back story we have on him is that about 3 years ago he was pushed into a fence by some dogs. When this happined he had a bad cut on his left hind leg near the pastern which he had stitches on and he also had damage to his right eye. (he is now blind in that eye)
When we went to pick him up, the hind leg that had the stitches was extremly swollen (about 2 to 3 times the normal size) from the thigh all the wat down to the coronary band but it didnt seem to bother him at all. He could walk, trot, canter, gallop and even buck around with no pain. Anything above a walk you would notice a slight difference in the gate but only because that leg was so much bigger. We talked to the owner and he said that the leg had been swollen since shortly after the vet stitched him up. He also said that the vet came back out to look at it and said that it was fine and would always be swollen.
We have called our vet and he will be out to our barn on Wednesday to look at him. While we have been waiting for the vet to come out he cut his fetlock (on the left) and some clearish pink liquid came dripping out. It drained for almost a whole day and some of the swelling actually went down. but after it stopped draining the swelling came back again. His leg has only gotten worse and the swelling has spred to the other hind leg. He now seems to be in alot of pain. He doesnt want to walk much and when he does walk he seems to almost tip-toe in the back end. he hasnt lost his appitite, hes still drinking plenty of water and he is not running fever at all.
With all of the research I have been doing. everything is pointing to Cellulitis, lymphedema, and or lymphanigtis. has anyone delt with any of these issues? If so, what kind of experiance have you had with it? How costly is treatment?

ok, well i tried adding photos but its not working so im going to add alink to my facebook. of you look at the album titled "the horses" hes the red dun (should be pretty easy to notice the huge hind leg) Here it is Welcome to Facebook | Facebook

Thank you for any and all input!