I am actually asking this for my niece since I have no answers for her.
She is on the east coast and her bunny above, who is let out daily for romps in the grass, has started stuffing her face with grass and just running around with it hanging in her mouth. She's just keeping it in her mouth like that. (My niece isn't sure if her bun is male or female. It's at least 5 years old.)
Any ideas?