Aid for My Dog's Critical Health Battle

Hey everyone, this is a really hard time for me right now, emotionally and financially. I have covered as much as I can financially. My dog has gotten severe constipation where food has not been able to go through his GI tract and has caused his large intestines to be filled with stool and colon filled with gas. He needs more care with specialists like a radiologist, cardiologist, and internal medicine doctor. He's a good boy and has got me through the hardest hurdles I've gone through. I just want to repay that and help him through his hardest hurdles. I appreciate anything that can help my boy.