Oh, my bunnies will eat a lot more hay when it is in a pile in their box, but I give them hay in their rack too. If the hay rack holes are too small many buns won’t eat from them.
You can make a temporary hay-hopper with a paper bag or cardboard box, by cutting a hole near the bottom and attaching it to the side of the cage (large enough for a good amount of hay to stick out, but not so big it all falls out).
If your bun is tidy in terms of litter box habits, you don’t necessarily need a rack. Before i had a bonded pair, my bunny would always use one side of the box, and eat hay from the other, so I would just pile his hay on the “kitchen” end of the box. Once I got a pair though they would trample it all so I started using a rack.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.