Soft collars, known as recovery collars, work well to prevent the rabbit from scratching at its face or nose and are also very comfortable. There are other options for restraint collars as well 4.

Restraint collars can provide an investigator ... and digesta retention from different physical forms of the feed in the rabbit. Comp. Biochem. Physiol. Comp. Physiol. 102(3), 559–563 (1992).

"If your rabbit has darker nails ... this on a non-slip surface or a towel and says that you should use gentle restraint. She ...