I replied before so may be duplicating what you see here...I adopted rabbits last year including a momma with babies. Kits were around four weeks at the time. I immediately started giving a variety of fresh and dried plants and grasses. I also give pellets as I believe as long as non toxic food is offered most animals will not consume harmful things. All the rabbits made it to adulthood without issue. The adults I added to also showed no issue. A couple weeks in I read about food and bloat and all the things that may go wrong but everyone seemed fine. I'm aware of the status of all but one we gave away and they made it to adulthood fine going back to just pellets. The five I kept are great and definitely prefer the wild foods over dry pellets. They get very excited to see the apple branches with tiny dried crabapples still attached
I'll reiterate that now about once a week I mix up a large tub of apple, willow, honey locust, mulberry and lilac leaves/twigs. Those and a large garbage can of locally harvested hay get hauled into their enclosure for easy access. Smaller things like sweet pea and sweet potato vines, calendula, wheat, sorghum, dandelion, celery, kale, oregano, lemon balm, comfrey, catnip got mixed with dried veggies for food dish distribution.
Just had one of those babies, my favorite of the bunch, give birth to five or more kits. I'll be pulling them out to count in a couple days, she seems to be doing well and I don't want to mess her up. Might have more from another one of the younger does now. I'll be continuing feeding as normal.