I've got a ball and 3 boas...2 red tail and a hogg island...The boas eat much better than the ball...my year old hogg is tiny and still can eat a rat pup, my male red tail isn't all that big, less than 2 years and can eat a weanling or a small rat and my 2+ year old female eats the biggest rat i can get...they have never regurged and even feed the day of a shedding....and they can put it away...i'd try a larger size, you'd be surprised.