AALAS Laboratory Animal Technician (LAT) Practice Test

Rabbits have a limited blood volume, so the amount you can safely collect at one time is restricted. A standard guideline is not to remove more than about 1% of the animal’s body weight in a single blood sample. For a 3 kg rabbit, that’s roughly 30 mL.

Taking about 30 mL every two weeks fits the typical practice because it uses the maximum allowed per draw while still giving the animal time to recover between samples. The other options are smaller than the maximum safe draw except the one that exceeds the 1% limit; 35 mL would go over the safe per-draw limit, while 3.0 mL or 15 mL are well within the limit but not the maximum.