Not all snakes, but i do agree boas and like balls should be

I may be wrong here but just going off of what iv noticed, it seems rats are more nutritional. I had a boa that i fed just stickily mice for maybe the first 6-8 months? He didnt grow very much... Soon as i switched him to rats this thing is growing like a weed.

So i will say to me it seems like rats are "better" than mice, but thats just because iv noticed a few snakes hit "growth spurts" after the switch from using all mice to all rats.