They can take rodents alot bigger than is typically recommand. I have a female spider mojave that was 65 grams out of the egg. She took a hopper the day after shedding on 23-Aug-11. She ate a normal adult size mouse as her 2nd meal. Her 3rd meal she ate a large mouse (40 grams). On her 4th meal she was switched over to rats. Last night just 31 days after her first meal she took a small rat weighing 70 grams which was 36% of her current weight of 193 grams. I beleive the largest meal for her was the large mouse @ 44% of her weight at that time.

Xavier