We did this two years ago with an almost identical little guy. After we fed him we put him in the sink and stimulated him with a warm wet wash cloth. he had some constipation issues and had to have a vet enema, but after we got that squared away he was fine. Now he is 18 lbs and as spoiled as any cat on the planet. He loves water now too. The milk you use is important. THe Vet told us to stop using the powdered stuff I got at Walmart and to use KMR. It worked wonders on our little guy though it is kind of expensive. There are home recipes on line too. We didn't try that. The only other advice I give you is to find some leather garden gloves. In a few weeks you are going to need them. LOL Good luck.