I feed him once a week, I am not 100% on what size mouse. I go into the store and ask for a feeder mouse and they give me one. Some mice are bigger then others, not by much but still they vary a tad. They are about the size as his widest part but definitely not bigger. A new store poped up around me that is a reptile specific store, I think ill try them for the next feeding day. Is there any benefit to feeding two smaller prey items compared to one larger prey item or vice versa? And as far as it being a "mood", is it normal for BP's to get moody when they have not been moody for 4 years? And if it is just a mood when should I expect him to go back to normal? I would think that depends on the snake but I figure id ask anyway. Like I said this is my first and only snake, iv had him for awhile but I am no expert