There are red-tailed hawks where I am and although I doubt they could carry off Trixie or Cody, I don't think they'd have a probelm at all with little Kasey and probably Abby too. Either way, that didn't stop one from coming ONTO the screened in poarch after them. Even if they couldn't carry them away, those talons can do some major damage.
I've seen them come down and get rabbits w/out a problem, I seriously doubt there is THAT much difference weight wise between our dogs and rabbits.