But, she adds, they do not work as well as the new drugs. They may have a calming side effect, which is one reason they were used. Male dogs were thought to fight more than females, so female hormones were given to stop males from fighting. It's not really that simple, says Dr. Overall. New studies show that male dogs may not fight more than females.
Hormones have a wide range of harmful side effects.
They are used to reduce anxiety including separation anxiety, fears and some aggression. Narcotics Have been used to treat sterotypic and ritualistic behaviors in dogs.