Dog Agression Heat. Aggression in female dogs during their heat is a common complaint. Drastic hormone changes can adversely affect a female dog's mood and can predispose to acts of aggression even if she has never been aggressive before.

Drastic hormone changes can adversely affect a female dog's mood and can predispose to acts of aggression even if she has never been aggressive before. Drastic hormone changes can adversely affect a female dog’s mood and can predispose to acts of aggression even if she has never been aggressive before. Also, they’ll be restless, bark a lot, or howl at night.