Have just been going through this with Big Fuzzy - who is a gannet of some magnitude, cannot be left in the yard on her own, and has a very low boredom threshold....
Hay - yes, I used her horseage nets to start with - doubled, still got through lots of hay

Soaked it & double net, still using hay...
Then got a copy of an eliminet - that really got her goat - lots of tantrum & face pulling about not being able to get huge mouthful of hay

Now coping with it......and I've adapted her horsehage nets to be like the eliminet by adding twine through them - and giving 4 or 5 nets a day, total now of 4 small bale sections a day. 50% less than she might otherwise have been eating..........
Bedding - has to be on non-straw bed, she would have not a stick on the floor otherwise. Comfybed has stood up to big tantrum hooves reasonably well.
Good luck - hope yours comes through it. I have vet back this Thurs for check up