I don't know what to say about this...if it is out of character for the dog it could have been many things, like a triggered prey instinct or maybe even some kind of deficiency. I had thought that maybe there was something wrong with the kitten...you might consider talking to a vet or animal behaviorist.
(((((Hugs again))))) SG
Survival Goddess "The most common way people give up their power is by thinking they don't have any." -Alice Walker
