Though since he goes straight to biting, I wonder if he's been punished in the past for growling.
This isn't always the case. Chloe, our HA dog, almost never growls before biting and she has never been punished for ggrowling. Even as a pup, her only warning was hard eyes and a tight mouth, then she'd bite. Some dogs just don't growl.
~*~ Cynder ~*~ Abrams ~*~
Daddy's Girl Lab/Spaniel muttly and Momma's Boy Chesapeake Bay Retriever
Home Away from Home: Chloe, Gracie, Cooper (dogs), Apollo (cat)