Thank you for all the responses. One more thing that might change it just a bit. I weighed my guy december 13 so I was thinking in about four days he should be at 400g. I was some how thinking that when I weighed him was 397g, however, when I checked my record on him a few minutes ago turns out he wasn't 397 but 370g. So now knowing this information do you think it's still fine to feed him a 63g rat or is this now to big?
Thanks so much for all yall's help. I'm new to balls and just don't want to do something that could cause some complications.