Hi, I rescue, cottontails and orphaned bunnies.
You are doing great with the babies, but the goats milk will not have the nutrition that they need to survive and thrive. Here is a recipe I use to raise babies successfully. Mix 1 can of goats milk and 1/4 cup of heavy whipping cream together and keep it in a small jar in the fridge. Warm it up and dropper feed them, but be careful not to over feed. When the kits are about a week old, get some
fresh cecotropes from one of your other rabbits, and mix them up with distilled or well water to make a milky chocolatey looking smoothy for them. They
will not survive without the cecotropes. Mix about 1/4 tsp. (or a few drops) into their formula, and give it to them
every day. I have also added a teaspoon of plain yogurt to their formula after warming it up in a hot water dish. (Don't use the microwave as it will destroy the good bacteria.)Without the cecotropes they will not be able to digest their food. If you have any questions feel free to PM me and I'll be happy to help the best I can. If you were nearby I'd raise them for you. I adore them. Also, get the mother rabbit neutered, as it is likely she may be too high strung to raise her own kits. It is hard to change a behavior like bunnies eating their young. She might make a good pet for someone, rather than breeding stock.
Good luck with your babies! I hopd this helps. Let me know how they are doing.
Bunny!