If you haven't yet, meet Walter. He is our foster dog and has been with us for almost 4 months now. He has had such a rough and unfair start to life. He was picked up as a stray and came to the rescue with a busted leg. Once his leg was fixed he tested positive for Heart worms and started his treatment shortly after we brought him home. As soon as he was finished with that treatment, he got a bad arthritic flare in his bad knee. Turns out his muscles atrophied as well and he was down to no strength in that leg. Fast forward a month to today. He is using his leg 95% of the time but started breathing very heavily and is not himself. We are going to the vet first thing in the morning, but its not looking like its going to be the best news. My heart is breaking at the possibilities. I am praying for the best but preparing for the worst.