Carrots are not bad for bunnies, nor are apples (provided you don't feed them the stems and seeds). Variety is important to a bunny, as is a high-quality hay (I personally use timothy-it's a bit more expensive, but nutritionally better than alfalfa).est Answer: Carrots are good in proportion with other vegetables. As with any food, if given alone without any other vegetables the rabbit will be lacking in other vitamins and minerals. Carrots are good and contain essential vitamins. All vegetables contain natural sugars.