I have raised rabbits for a number of years and the best way I have found for transporting them is in a cardboard box when you don't have a carrier like KikiLeigh02 says. While breaking a rabbits back is a possibility I have never had that happen no matter how flipped out and struggling the rabbit is. Hold the rabbit firmly by the scruff and gently cradle its bottom in your palm. Also, remember that rabbits do not like feeling like they are about to fall, so don't keep that position for very long. When I trim a rabbit's nails that is scared I always ask another persons help to hold it firmly against their body. Rabbits need to know that you are boss bunny so always talk in a firm, kind, soft voice when working with them.