First, welcome to Pet Talk!!! Second, in all the years that I have had cats(20+years), and all the cats I have had(20+cats), I can say, I have never heard of or seen this type behaviour!!!!! How old is the cat? Is she spayed? Has she been to the vet lately? Did she exhibit this behaviour in the other foster home/s? I think this might be something to discuss with the vet....good luck and pleasse let us know what happens!!!! Sandra