Hi there - Some good replies here for you. My experience and opinion - In terms of pack dynamics male dogs can be much easier to bond together in a pack than multiple females, in nature there would be more males than females, it is a humanized myth that females of the species dog will get along better - this is not the case in dog psychology - females are more likely to fight on to death. So, breed aside, I always have more males in my pack (all neutered) than females, currently the ratio is 8 males to 5 females and this just works! Sure the "middle ranked" males did fight during their social climbing stage (up to about 3 years) even though they were neutered, but before they reached that age we humans became the Pack Leaders and the inter-male fights stopped completely - no rank issues to fight over. The way to have a balanced pack is to have all dogs as equal followers to me (this is how Cesar runs his large pack), and we follow exercise then discipline then affection, discipline is key - rules. boundaries and limts.
So now on to breed, "yes" it does have a part to play, though of course breed can be blocked through energy draining exercise. Though this is much harder when one has dogs of the same or similar breed as dogs can and do "breed-up"!! I have Terriers (8) in my pack, many said to keep a large pack of Terriers will indeed lead to fighting - it did but following rehab it does not now, Cesar's Way is the only way I know of to have a dog pack of Terriers (more than 2) living together in balance. Terriers can indeed have excited energy - highly reactive as this is in their DNA to work and hunt alone, excited energy preceeds the kill of a rat for example, but this energy in a pack of Terriers can lead to fighting amongst themselves, so when contexts arise that could trigger excited energy which caan then trigger aggression, I have to step-up my leadership and boundaries etc to control the pack, redirecting the Terriers. We cannot change DNA but we can control and manage our own dogs, just because my high energy Terriers need to displace their triggered reactions they are now taught to disperse the energy on a toy not on each other! The best way to fulfill breed is through various types of mental and physical exercise, I am not out "ratting" every day, yet my Terriers are all fulfilled dogs. With not enough rules, boundaries and limits dogs can and do behave with more primal instinct as their DNA tells them to do.
My advice would be to be sure you have the calm assertive energy to raise an equal balanced pack of Terriers, I cannot stress enough the importance of Pack Leadership of multiple Terriers in the same home, it can be done my pack are indeed proof as well. Well done to you for asking the question, consistency would be key as well. Best wishes Suzie.
Suzie Crystal
Cesar Millan Ambassador & SWC Ambassador
Pack Leader of 14 Dogs!
http://crystal-dogblog.blogspot.com
CrystalDogs, Canine Psychology and Behaviour Services, UK.
Dog/Owner Coach