Your complaint is going to go nowhere, honestly. If the officer felt threatened, he was in the right. YOU do not determine the officers threat level because you know your dogs and they were on your property.

You called them in the first place remember? They had a right to be there and he had a right to tell you to control your dogs or they will be shot.

Get over it, noone likes to be threatened or to have their pets be threatened but it wouldn't have happened if the cop wasn't edgy about your dogs.