Definitely. Especially if they are about ready to move up a size in rat, but not quite.
The best way to tell, I think, is by weighing the food with a kitchen scale (can be bought at any box box or army surplus store for around $10; a digital one!)
I wouldn't suggest feeding more than 2 at a time though. I'm not quite sure the whole reason - someone with more experience can jump in! - but I have heard that it is best to feed no more than 2 at one feeding. It could be because there are less nutrients in 2 fuzzies compared to 1 pup of equal weight, for example... but don't quote me on that.
If you need to feed 3, then I guess it is much past due for you to have been buying larger prey for your snake![]()