Aly, if I were you I'd take the baby food out, and just give them grass, dandelions and clover instead.
Keep the hay and water. Please read Randy's posts again, and the info on the DFW wildlife page. (
http://www.dfwwildlife.org/cottontail.html).
They are NOT domestics, they do not eat the same foods.
When we first found Hazel as a baby (yes, she is one of those few cottontails that are happy domestics) we fed her mainly greens, the same that she would have had in the wild.
Only later, when she was adjusted more, she got also veggies and some pellets. She still lives mainly on greens. She's 6 now, and a very happy, healthy "house" cottontail
She is a Western Cottontail, but in our care she grew to be quite a bit bigger than the ones in the wild here. We were also lucky that she was about 3 weeks old, and already weaned. (She could not be released, because of a crushed leg. When she was healed, she was too "tame" to be released.)