Newborn Kitten – 5 Days Old – Restless

Hello everyone! I need some advice. My girlfriend and I found this abandoned kitten on Saturday; she was by herself and we made sure to wait a bit to see if the mom would return, but she didn’t. She still had her umbilical cord attached, but on Sunday it fell off. We took her to our vet today just to ensure she was okay, and our vet was happy to see how lively and active she is. The problem is: Every two hours, we feed her, but she doesn’t stop crying for about 20-30 minutes. We try to burp her and we help evacuate her bowels and everything before/after her meals. We just don’t know what she’s crying about. We try cuddling her but she’s so squirmy that she doesn’t stay in one place on our body long. We have a thermometer in the box (the box has a heating pad on the bottom, a blanket, and some washcloths for warmth, as well as a warm water bottle and a stuffed fuzzy panda) and the warmth doesn’t seem to be a problem. It’s warm enough in there. She’s eating very well, she eats about 3.5-4 CC of KMR every feeding, and she’s deficated today and the day before and they were the right color, so her bowel movements seem okay. This is our first time caring for a kitten this tiny, our last kitten (who is now 8 months old) was 2.5 months when we got him, so this is a fairly new experience for us, and any advice would be greatly appreciated!