They were fine last night before bed at 2 am. My daughter let 3 out at 3 am. One in the house was limping and the other 2 were outside. Tonight I let them out a few hours and one more came in limping. I'm at a loss as to what is happening. There are no marks on them anywhere. They're all very needy acting now and following me around. One is becoming obsessed with licking my fingers and toes and biting them like he is starving that may be something different but it just started about an hour ago. Everyone is eating and drinking like normal. I have the mom and one more kitten without problems. I just find it very strange to have them all limping at the same time. All are front paw limping.