He's a python, they LOVE to eat, well unless its a BP. Then they love to make their owners angry lol. I would just feed him one and see what size lump it leaves. I've fed Caesar guinea pigs so big they made him look like he ate a football. Never seen the guy so happy afterwards lol. I dont do it often but every here and there, i will give him a huge guinea pig and let him wrestle it down and go into a food coma for a week lol.
Heck, even Pat was so happy to see a mouse after i fed him a smaller than usual one and made him wait 8 days. The little booger started wiggling his tail like a crazy dog all over the perch next to him and his body lol. Thought his tail was going to fall off for a sec from all the wiggling haha.