2nd vote for the super glue. Adding the clear nail polish may work as well but both sting so the roo should be wrapped and controlled for your safety.
I agree with the heat thing. I'm adding in he will need good food to replace the blood loss ~ high protein some iron too maybe electrolytes and vitamin C to help fight off any infection. Whatever made the cuts most likely was not sterile. I would also put sugar or honey in the water to perk him up.
Editing to add that flour or cornstarch can help the blood clot to make a scab.
Edited by SallyinIndiana - 11/12/14 at 5:56pm