I'd agree with Christie, try the two mice per week thing. Just give him a bit of extra quiet time after a change in prey volume that first week or two.

If Dexter is anything like our Malachi, who just hit 510 grams at 9 months of age, he isn't playing when it comes to feeding day. Mal is a nice snake any other day of the week but Thursday is all about "hey you! where's da rat!!!" and he'll strike anything that is warm and moving. There's no way that male snake is that intensely hungry, he just knows feeding day and wants his meal ASAP! LOL I'm not complaining, I'm completely thrilled with his intense feeding response and wonderful growth.

Congrats on Dexter, he looks wonderful!