Some reading on bitch aggression:
http://www.caberfeidh.com/Fight.htm *******************************
"Inter-dog aggression escalates when the dogs reach sexual maturity (it doesn’t matter if the animals are spayed or neutered) which is usually between 2 – 3 years old, depending on the breed. Smaller dogs reach sexual maturity sooner, bigger dogs reach sexual maturity later. This explains how dogs can be raised together from puppyhood and then suddenly develops an intense hatred for each other and subsequently starts fighting.
Fighting is worst between female dogs. If a client considering the purchase of a second dog, I will recommend a male with another male or a male and a female. Female dogs will fight to the death and it is best not to put two females in them same household together. They don’t call them bitches for nothing."
Source:
http://www.thepetprofessor.com/secAr...Aggression.asp ************************************************** *****
From another breed: " Interbitch aggression is very serious and almost no good trainer claims to be able to actually "cure" it. Most who reach a workable solution do so by getting owners to implement a rigorous separation of the two dogs -- management -- with a small amount of behavioral mod."
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An article in a veterinary magazine re: inter-dog aggression. Note the final paragraph:
http://dvm.adv100.com/dvm/article/ar...l.jsp?id=17521 ************************************************** ****
"Fights between dogs in the household are usually about dominance-or social status aggression. These fights commonly occur when dogs reach social maturity, about 18-24 months of age, but the range is 12-36 months. Fights will be about those resources that are considered most important to dogs. These include food, resting-places, territory, favored possessions, and favored people. Fights then can occur over treats, owner attention, greeting the owner upon return, sleeping positions near the owner, entering or exiting the home, high arousal situations such as fence running, or movement through tight spaces. These fights occur most often between dogs of the same sex and seem to be most severe between female dogs."
Footnoted source:
Sherman, CK., Reisner, IR., Taliaferro, LA. & Houpt, KA. : Characteristics, Treatment and Outcome of 99 Cases of Aggression Between Dogs.
Applied Animal Behavior Science 47 (1996) 91-108.
Entire article:
http://www.vin.com/VINDBPub/SearchPB...00/PR00316.htm