Donate to help Pacha, almost 15 yrs old

Hi, my name is Lydia and I am asking for help to raise funds for a Colonoscopy for my rescued cat, Pacha. I have had him for 3 years now, and he has been suffering in pain every day with profuse, diarrhea. We have tried many treatments, tests, with no diagnosis and no help for him. He recently had a diagnostic Ultrasound with a Specialized Vererinarian who has finally diagnosed and confirmed he has Colitis. A Colonoscopy is recommended to be able to treat him with the appropriate medication. The cost is $1500. Please help me get the help and treatment to end his suffering and give him a better quality of life. He is such a sweet, loveable cat. Any help is appreciated.

Thank you