Absolutely beautiful! Anery's just happen to be my fave boa morph lol! That is actually a great specimen in terms of colour, many go quite yellow with age, and yours seems to be staying true to the word anery! I would definately say BCI, no doubt in my mind, but regardless that doesn't mean anything bad. Beautiful boa, and if I ever keep boa's, I would only hope for one like him. Even bigger congrats then before! As for rat size I am sure he could do a medium rat every 2 weeks, or a small rat every 7-10 days would be suitable as well. I might not own boa's, but the guy I work for does and that's generally how we feed his. Again thanks for the pics, ~Caylan.S.~