Well the good news is that he was 6 ounces on the 10th and is now 13 ounces. The bad news is he has phenomena.The vet gave me an antibiotic to give him three times a day and wants me to call him back today with an update. At least he's still eating pretty good. I also started mixing a little baby food in with his formula (as advised by vet)
And a big thank you to Douglas for his generous donation towards Buckys care. It's so heart warming to know there's people that care about this little kitten.