I'm trying to find the link to a very thorough nutritional analysis chart. It was posted elsewhere a long time ago. When I find it I will post it. It compares mice/rats/rabbits/etc.
Anyways, rats have more nutritional value than mice do. ( I have nothing to back that up except experience and that chart when I find it.. sorry ). But through experience, if you take two corns, feed them the same number of times a wk, but one is mice and one is rat.... The one fed the rats will grow faster, bigger.
As well, I've compared same age snakes, the one was in the care of a breeder who fed mice, the other in my care on rats.... The one in my care was larger.
Personally, I switch my snakes onto rats asap. They get fed 85% rat, the rest mice. It's a pricing and availability issue for me. I can get mice easily, not rats though. Rats are also more expensive.
As my collection has grown, I have come to feed rats for the first 1-1.5yrs of the snake's life, then switch to mice except for females after laying eggs. They get rats for a few feeds.
I'm not a vet/nutritional expert..... but I do know that it has been proven that rats have more nutritional content than mice. Will post the link as soon as I find it
