It would be nice to feed your rabbits something fresh when they are feeling better. Introduce really slowly and one thing at a time. I tend to steer clear of most veggies ie. Broccoli, spring greens etc and only feed fresh herbs, rose leaves and petals, bramble leaves, Calendula etc. Hay is the most importants part of their diet, but I think some fresh herbs etc are more important than pellets, so Basil only has a few of these, but he does have two big bowls of herbs etc. everyday. We have no tummy issues, so this seems to suit him, but of course, every rabbit is different. Hope your rabbits are feeling better soon.