Thanks, everyone for your support. Although, I'm not really understanding the replies. Perhaps, I shouldn't have even mentioned my size preference with pythons and the species of python I have, since it's off topic.

I just would like to know if a keeper grows up a python slowly by slightly underfeeding them, can they still reach there potential size down the road, or can doing this permanently stunt their growth?

Meaning, if you have a python that on average should be 6ft in length at 4 years old, but the python is only 4ft in length at 4 years old due too underfeeding. If the keeper then picks up the pace with feeding safely, can the python still reach it's potential size at say 6 years old instead, or is it too late to try and catch up?

I have asked exotics vets and dozens of people when at what age pythons should be full grown and most say 4 years old.

I do believe I grew my boelens up slowly by offering mice/rats that were on the smaller side, just because I was nervous about overfeeding. I thought is would be better to grow her up slowly then too quickly. Although, I have always been consistent with feeding her, always 1 item every 7 days since she was 3 months old.

Also, what do you think about feeding two medium rats that both add up to 200 grams V.S. one large rat that is 200 grams? Some say due to fat content large and extra large rats should be avoided.

I would post some pictures but don't understand how to. Thanks