We recently adopted a boxer from a local pound. He was about 15 to 20 pounds underweight. He came home and withing a week or two had gained about 8 pounds. He also brought a lovely case of K.C., and some serious eye boogers. He got over the KC and we gave him some penecillin for the eye infection. Now, a couple of weeks later, has lost all the weight he gained and is staggering around as if he's drunk. He also acts as if he can't hear or see very well. The soonest that the vet can get him in is first thing in the morning. Has anyone ever seen something like this? I'd very much appreciate some advice.