I also feed my boa rabbits, californians or new zealands usually. She is around 8 feet now and over 25lbs, plus or minus 5 years old. Sonja gets a 3-3.5lb rabbit every 3-4 weeks. This keeps her very content and in good shape. I noticed when feeding f/t rats she was always hungry and her body condition just wasn't as good(she'd eat about 4-5 large rats), she looked flabby. She's been on rabbits for quite awhile and her muscle tone is great, she's active and just looks good.