They tend to be lactose intolerent to cows milk, and it will give them stomach cramps, and the poos.
I know some vets rip people off, and that they are expensive, but they can give the kitten fluids if it is dehydrated. If they get dehydrated it can cause brain damage. So better a few dollars short, than a dying kitty. Good luck. ... View related article.
Just make sure you have his vet records and that they contain a test for heartworm.
Sometimes people sell dogs out of the paper due to testing positive for it. It costs a lot to treat it. very little to prevent it. ... View related article.