Please help, this is urgent- question about newborn rabbits?

my two dogs just came up with two newborn rabbits, maybe about 20 minutes or so ago. one has a gash by its left rear hip. apparently its only torn skin and its not through the muscle. the other rabbit seems to have no cuts or other injuries. my dad went out in the yard to see where my dogs may have gotten the rabbits and he found tered tufts of hair and remains of a rabbit... i dont want these poor things to die. i understand that there may be nothing that i can do, but i really, really want to try to help them. unfortunately we cant afford to take them to a vet clinic. can someone please, please give me advice on what to do? we have no idea wheretheir next or burrow or whatever you call it is and we can't go looking- we live on a lot of land. i cant just leave these newborn rabbits to die...