How are you making out? When I rehabbed my cottontail I made a formula from condensed milk, cairo syrup and eggs if I remember correctly - try searching for the ingredients online, it worked well for me. I want to copy a previous posters sentiment and warn that cat wounds, however minor, can be highly toxic and fatal without medical attention. If you do find any wounds at all, first aid in the form of cleaning with povidone iodine is in order, and certainly carefully selected antibiotics. The wrong antibiotics can readily cause rapid death in rabbits as well.
Anyway, good luck. If there aren't any wounds, the little tike stands a good chance of survival if you read plenty, do your research, keep him / her fed, etc.