My daughter has a girl that was a pickier eater when she bumped her up to weanlings. Same thing where she would hit and coil, but then not eat it. My daughter would just have to take the rat and heat the head up again with a blow dryer and offer the same rat a second time. Then she would take it again, but eat it. Not everytime, but most times. Since it's a different batch of rats, it could be they just have a scent she needs to get used to. Give it a try.