Hi I just picked up a 1.4 group of rats with a litter from a friend of mine. Two days ago one pregnant female died after having one pink (which was eaten by the other rats). Then today when I got home I was checking everything and noticed one was breathing abnormal. It was the mother of the litter. I picked her up to examine her and it was like she had a something similar to "spider wobble". She then died in my hand about 20 seconds later and became stiff as a board. I had another female from a different rack die as well yesterday. They are eating mazuri and are housed in large racks. Any idea what is going on? And will the other females take over the pups? Thank you.