URGENT! Son fed our Baby rabbit cabbage!?

"Bunnies 0 - 4 weeks of age need mother's milk. They will start eating pellets, veggies and alfalfa at about two to three weeks old, but they are still quite young to be without their mother. Orphaned bunnies at this age, especially newborns, are extremely difficult to rescue. The biggest reason why these babies don't make it is due to low blood sugar level and low body temperature. Extremely small babies are difficult to feed because their mouths are so tiny it is hard to feed them milk without them inhaling the formula. If you have orphaned babies, it is best to see your vet and get help. If that is not possible, you can feed your babies KMR, a kitten milk substitute. Mix one large scoop of KMR with one drop of Karo syrup, and add goat's milk until it is the consistency of cream. Heat until warm,but not too hot, you can seriously burn the little babies. Feed with a syringe or bottle. They should eat at least 6-10 mL of liquid twice daily. Only feed them twice daily, unless you are having trouble getting them to eat enough food. DO NOT OVER FEED! Mommies only feed their young one to two times per day. Place the babies under a heat lamp, half in and half out of the light. Their bed should be a small well or depression, filled with soft bedding such as bunny fur or cotton. After about two weeks, you can start to offer food for your babies, so it is available for them when they are ready to eat. Again, a veterinarian is the best bet for this situation."