Wick has chronic teeth problems because of his crooked jaw and underbite, so at a minimum he gets a molar grinding and bottom incisor grinding every five weeks. When Wick was on loose Timothy hay, he would frequently spit out a lot of pieces because he couldn’t chew them and/or they didn’t taste good (very possible to start chewing on a piece and literally spit it out because of dislike, rather than teeth problems).
I changed Wick to eating broken up, compressed hay stacks, and his hay consumption skyrocketed. He likes the hay much better, and in my opinion, the kinks and crooks and small hay strands resulting from compressing are much easier for him to chew and manage.
Wick does occasionally still spit out pieces. Whether it’s mouth discomfort or dislike, I’m unsure, but he definitely eats a lot more hay now.
I suggest changing your type of hay and experimenting. It may take a little bit for your rabbit to adjust and commit to a new type (Wick wasn’t enamoured by hay stacks at first), so give it time.
If non-hay items are distributed frequently in a day, it’s possible she’s abstaining from eating hay, waiting for non-hay food items. Limiting presentation and quantity of those foods is typically a good approach as well, and it does not need to be permanent necessarily.
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.