I have a BCI, but am not an expert. He looks okay to me (also on my cell). Easier to overfeed a BCI than underfeed.
I would be feeding weaned rats though. Small rats are 60-90g and that’s a lot for a BCI who is 490g.
I fed Behira weaned rats weekly until she was about 600g. Then every other week a small rat between 60-70g tops. Now she is 715g empty and before eating last night. I am still feeding smaller small rats. Last nights meal was 60g and she won’t eat again for two weeks. BP’s can pretty easily eat 10-15% of their body weight (up to medium rats for even females 4000g and under). BCI’s are bigger snakes overall, but although thick bodied, have more length to spread it out over. They are also more sensitive to big meals and have a slower metabolism.
Like a BP, I don’t feed anything that I can really notice in their belly after they eat. You don’t want them to stretch. I would stick with 10% of body weight prey or less for a BCI.
So, again, weaned rats now (40-60g) are probably better for him now, and he will thank you later.
Slow grown boas are healthy and long lived boas.