When I went to check on my newborn kits (30-36 hours old) and they are warm and appear healthy. However, as I picked them up they all started jumping and squeaking with their mouths open. Is this normal or is it a sign that momma isn't feeding them? I have photos if that helps, but it doesn't appear that I can load them from my phone. I can email them. Thanks so much!! It's my first litter on my own so any advice would be appreciated.