What size food?

I recently got a new baby BP, and he's due for a meal tomorrow. My question is, I only have access to normal adult mice from petco right now unless I drive an hour away. My BP is a little thin for an adult mouse if you go by the diameter rule but I think he may be a little on the thin side right now. He's 20 or 21 inches long and probably a little over an inch wide. I haven't weighed him. Just wondering if it's safe to feed him an adult mouse. I can upload a picture of him if i need to.

If he's too small for it he's to small. They can take a little bulge but considering he's new to you, take it easy on the size until he's used to his new home. Rule of thumb is 10-15% of your snakes weight.


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