Tracy, most likely it’s because you started veggies! If your bun is old enough, nothing wrong with veggies, but rabbits really like veggies more than hay. Since your rabbit knows he’ll get veggies, he may be holding it eating hay in hopes he’ll get veggies instead. It’s like giving a child candy every so often while expecting them to eat a lot of salad as well!
Not sure your feeding schedule, but I’d limit veggies to one or two presentations per day. For two, maybe one in am and one in pm. This way, when he’s hungry after am feeding, he really has no choice but to eat hay when he’s sick of pellets. You’ll want the knowledge of someone more savvy, but my thoughts are if your rabbit is 4mo and is eating veggies, you can start to limit pellets. This would encourage hay appetite as well. I’m not too knowledgeable on it because Wick never had an unlimited pellet diet due to health reasons.
Also, is fresh hay more enticing to him? Rotating the hay in fresh hay (add what’s left in his hay box to your fresh Timothy supply, toss it around, then put a handful back in his box) helps Wick’s hay appetite when I see he isn’t touching his hay as often.
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.