Oh My! I am so sorry to read about your boy. I know you'll do your best to keep him comfy. It is so hard when our beloved pets get sick and cant be cured. I went through it with my Luke and toward the end I actually prayed that he would go naturally because he was so weak that he couldnt walk...just crawl. I couldnt stand to see him like that any longer (I prob waited too long) and took him to vet to be PTS. He went so easy. If you have to do that, I know your Bartie will understand and know that you're helping him. You're both in my prayers.