Just on more question:

Snickers has never been a "picky" eater and had no problem transitioning over to bigger mice sizes but now I am a bit worried because it's now rats(and I'm sure they smell different)

I just don't want Snickers to freak out about being fed a different species now and refuse food.

Do most snakes transition from mice to rats easily?

I only have concerns because I don't want Snickers to go on a "hunger strike" to the point where I have to feed her "LIVE" prey....I'd much prefer F/T for her safety. (I have read once you feed "live" it's virtually impossible to make your snake eat F/T again and I don't want to get to the point where Snickers won't eat F/T)