About three weeks ago a dog showed up on my front door step, he was very playful and hungry so I took him in and took care of him. The first week I had him his right eye was starting to look like he was going blind, and he would throw up every other day. I just kept a good eye on him and examined him everyday. After about another week his eye was getting its color back and he was fine. Well today he has been throwing up everywhere and also peeing and pooping everywhere. When he walks it looks like he is off balance. I gave him a little bit of children's Pedialyte and also gave him a bath because he was filthy. Now he is just being really lazy and I'm getting even more worried. Please help me.