I'm pretty new at this but here's my opinion. My ball python is almost 5 months old and weighed 225 grams at his last weigh empty. He can take a rat Pup no problem. In fact, the last time I went to the pet store all they had was fuzzies so I bought some. When I got them home and looked at them all together, there were 2 that were smaller then the others. I picked those 2 out and fed him both of them. If your snake will take more than one at a time, go for multiples. I just wait until he's got the first one down and then let him bite and coil the 2nd one. He's taken multiples twice for me no problem. 70 is a lot! But that's what I would do. Just feed multiples. Weigh the rats and take into consideration that your snake can handle a meal that's 10 - 15% his body weight.