Sugar from carrots and raisins make for one heck of a stinky litterbox! Sugar and too much protein mixed together can give your rabbit “poopy butt” which will lead them to not wanting to eat their hay and can also cause other problems (stasis / gi tract issues.) Rabbits need very little protein and only the tiniest amount of natural sugar (raisins sometimes have added sugar in the form of fructose, corn syrup, dextrose, maltose, or almost anything with an -ose, so be careful.) If her litter doesn’t look like hard little round dirt clods then she’s having food issues most definitely. Some rabbits, when they get older, cannot eat very much in the way of many alfalfa-based pellet foods at all (or sometimes, ANY pellets) without causing them intestinal stress, so I would definitely agree with Scarlet_Rose about slowly switching to timothy pellets first before attempting to remove pellets from your bunny’s diet (which you might need to do.) One more thing about pellet foods — some commercial brands add fruit or sugar and extra animal fats in the form of protein (nasty!) to the pellets in order to make the rabbits ‘like’ to eat them, so you may want to check the ingredients / nutritional information on your pellets to see how much sugar and protein they contain (protein should be NO higher than 14%!) Make sure your pellets have at LEAST 18% fibre/fiber.
Also, if the hay gets wet/damp at ALL, throw it out. Wet hay can be VERY dangerous to your bunny and she might be avoiding the hay because it’s ‘wet’ and she doesn’t want to get sick (which is why she might also be trying to eat her litter.)
What kind of hay is she eating? If she’s older than six months, you’ll probably want to make sure she has oaten hay or timothy hay instead of lucerne or alfalfa hay, which is for younger than six months.
My vet always tells me to give my rabbit unlimited hay, 2-4 ‘cups’ of fresh vegetables, and a MAX of 1/4 ‘cup’ of pellets (since she’s a mini-rex — any bunny under 3Kg or 7lbs) — with treats given sparingly (two slices of a carrot, two halves of a cashew, a peanut or two.)
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