I dig mean snakes, LOL!
Seriously, at 3.5-4' in length, it can handle a larger prey item than an adult mouse. I've got Morelia and Aspidites of that size that eat larger meals than that. This is not to say you aren't feeding it enough. When a snake is fed several small prey items, they digest them more quickly than a large prey item, making it ready for feeding more often. I feel this has alot to do with feeding response.
In addition, I've a friend with a 5 year old son, a large active dog, and lots of friends in and out of his home. His initially docile burm became a mean SOB after a few months. He gave this snake to another friend of mine who leads a quiet lifestyle of a single woman with a love for reptiles. She provided the snake with several hides, a quiet room for its enclosure, and appropriately sized meals at 10 - 14 day intervals. This burm is an absolute sweetheart today!
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"He who would stifle debate rather than engage in it, does so at the expense of his integrity and credibility"
Mike Curtin