He normally only gets fed once a week, but the other day, I warmed up a little rat for my young blood, only to open up the cage and find the blood shedding, so I gave it to Phantom, not really thinking he'd take it, and he did.
He'd eat me out of rats in no time at this rate!
EDIT-
Didn't see your post! And no, I've never taken them in aside from when I first purchased them about a year ago, and they came back with a clean bill of health. I've gotten 2 bloods and just recently a spider since then, but none of these snakes or their bowls/cages/etc have ever come into contact with each other, so I don't think he could have picked up anything from them.
My bigger blood I did get for free because he was about 90% of the way dead and had a mouth literally full of mouth rot and a respiratory infection. He was treated with I believe Baytril and has since cleared up just fine and is even putting weight back on and eating on his own most of the time. If not, I just have to slip a F/T rat head in his mouth and he takes care of the rest. But, that's the only sick snake that I've had. I could have him looked at most likely in a week, maybe 2 if you think he should be examined again.