I really don't think there is a right or wrong way when it comes to mice or rats. Just comes down to personal preference and what the snake wants to eat.

I just take out whatever animal/size is in the freezer for that day. Although I mainly use multis, with the occasional rat, gerbil and mouse. Personally, I won't feed mice again as the majority of the diet! Not unless was breeding my own, pet shop sizes are really small! Having a seasonal fasting mouser just creates a big headache/worry, especially if they only eat one at a time.

On the occasion they do get something larger, I'll wait 2 weeks before feeding again. One of my adults still seems to enjoy, well inhales baby rats! I like reading about how other people feed! Just comes down to personal preference and what works for you and yours!