Hucow is gone. Say hello to saggy. That was somewhat the intention of hucow, but now it's been reworked and able to be mixed with the other triggers. Play around with the weights of each, mix and match. Works well up to 1.3 weight on triggers and after that it might give you some funky nipples, unless you want those.
note If your model is having trouble with the flat prompt, try (flat chest:1.2)