Well first of all thanks to everyone for their input with this Mice to Rat thing....Unfortunately my Jazzmin is a Strict Mouser..She still wants nothing to do with a rat, so mice it is...My last attempt failed and she acted like i was trying to feed her a cow...acted like she was scared of it..so out of the freezer came a mouse,after thawing and warming..lowered into tank and BAMM...the way she took it was like she hadnt eatin in weeks..made short work of it and within 10 minutes took another one..case closed..I will probably try rats again down the road but like a previous poster said,as long as she eats whats the difference