There is a similar topic over on the Burmese forum. I replied to it over there, but the flames haven't ignited yet. So here goes over here. I have at times fed my pythons wild animals. Many years ago, I was told by a very knowledgeable veterinarian (who was a boa breeder and very good with exotics of all kinds) that it is acceptable to feed captive snakes wild caught prey. He said that reptiles are not susceptible to mammal diseases. I once had a 16 1/2 foot albino female that was fed a wild caught rat or two when she was a juvenile. I was in college, and the local pet stores couldn't get big rats. She wasn't large enough to eat rabbits yet, so we set out some live traps and caught a couple of big rats in the basement of a nearby fraternity house. We killed the rats and fed them to her dead. She gobbled them right up. No parasites, no sickness, nothing. This wasn't a regular practice, but it worked when domestic rats weren't available.
I also have a 12-foot normal male Burmese that has eaten both rabbits and squirrels from the wild when he was smaller. These were roadkill animals that were in very good shape after their untimely introduction to four-wheeled vehicles. I guess it's been about 4 years since he's eaten anything from the wild, and he experienced no problems at all.
I didn't mention this over on the Burm forum, but only because I was talking about my experiences doing this with Burms. But I also fed a retic an owl that flew in front of my truck and got stuck in the grille. This particular snake was finicky, and would only eat birds (i.e. chickens, quail). The owl was small and fresh, so I dropped it in the cage. She ate it up, and again, had no problems. I think the owl incident happened in early '97 if I remember correctly.
I posted about this myself on the Burmese forum maybe a year ago, and got flamed pretty hard for it. I don't make a habit of doing this, and I haven't fed a captive python a wild animal in about 4 years. I have a good supply of domestic rabbits, so it's not necessary.
If you decide to go this route, do not feed a snake anything that has been shot. Even a .22 that passes straight through the animal leaves traces of lead behind, and they'll even digest steel shot if you use a shotgun (so I've been told).
I've also heard of people using wild prey items to stimulate a feeding response in animals that are refusing food. Something about the "wild" smell/taste that is supposed to stimulate feeding.
However, I wouldn't go so far as to recommend this practice. I've done it out of necessity at different times in my herp career, and it's always worked out. If you go this route, proceed cautiously and realize there are risks involved.
RP