Hello - I have a 9 yr old pit bull, and a Doberman just shy of two. My pitbull was a rescue and is not spayed. I've had her almost 4 years and she has yet to have a single behavioral issue. Very needy, protective and a mush. We brought my Doberman home at 6 wks, also EXTREMELY loyal and affectionate towards my husband and I and most anybody she sees!. She has grown with my pitbull and they have been inseperable since. Both females. The the last six months ( since heat started) she has been starting some very scary fights with my pitbull over territory I guess. It only happens if Doberman is laying on me and pitbull walks by too.close, or food ...eating too close. Its extremely scarey because obviously my pitbull is also very strong and its very difficult to break it up. The Doberman almost always winds up with the worst wounds. About twenty minutes of keeping them seperated and they're fine again. Like best friends. I've made an appt for Doberman to get spayed next week. My vet also suggested a 'dog prozac' type of med I can give my dog. Its.not fair to.my pitbull because shes much too old and often pees herself during and Shakes afterwards. She never sees it coming. The Doberman has zero aggression towards anything else at all. Even my cat she loves. . Just this, what can I do if anything? Any thoughts on the medication and spaying? My girls are my life and I have to.fix this because giving one up.is simply not an option! Please.
Pit bulls are better at fighting other dogs I'd say... I separate the dogs when there is nobody home to supervise, separate dogs immediately when there is a squirrel or visitor in the yard, supervise treat and feeding times, and don't play with both dogs at the same time anymore. 
