I wish there was some magical thing I could tell you, but it sounds like you have already taken the most important steps!!! Are they taking the KMR from the syringe ok? You can rub their little backs after they eat too, to try and get them to burp ..... you may or may not know if they do, but it is good to try! I'm sure you know this, but just in case, no milk at all ... only the Kitten Formula!

Do they seem like they have energy, or are they lifeless acting? You can rub them gently with a towel to help stimulate them to breath more regularly as well. I wish I could be there to help!