Please help Red pay medical bills

Thank you for even taking the time to look at this. Red is a 3 year old red nose pit bull with the biggest heart. He was left in my care approx 4 months ago when his previous owner moved out and left him. I have done everything I can to give him everything he needs and wants. I began walking him daily up to ten miles on some days. He was horribly obese when we first met and could barely breath when he would finish his walks at first. He would literally lay on his side gasping for air. Now as time has passed me now walks and runs like a champ. He's lost a healthy amount of weight and has been the joy in my life. I myself am a recovering addict who suffers from ptsd. And red has helped me more than I could ever do for him. It breaks my heart to see him like this. It began a week ago when he all of a sudden couldn't keep down anything he would eat. I worked feverishly trying to find a solution or remedy. After humdreds of dollars and a few sleepless puke filled nights spent tearing up finally understanding what my parents always told me about what it's like not being able to do anything to help the person or thing you love the most. And here I sit. Not knowing what to do for the friend that I owe everything. Please help him. I don't by any means deserve the help. But he does. He's never hurt anyone. He's the biggest lover you'll ever meet. Please help keep red healthy. Please. Thanks for your time.