On the humorous side:
They tried being free weights, but it didn't work out.
More on the development and domestication of dogs:
Our dogs descended/evolved from the Grey Wolf(canis lupus) . They evolved both naturally and with human intervention.
Our paths crossed many times in early days. They would have sat near our campfires after a fresh kill, we would probably have seen them in the action of the hunt and they would have also seen us hunting.
There is a theory that most likely a human hunting group came upon a wolf cub and wanted to take it with them. The hunters may have raised it and realized the benefits of having the companionship and assistance of the wolf when hunting. A group of wolves could have helped lead man to prey.
So they would have crossbred naturally by survival of the fittest, then they were purposefully bred for characteristics that were helpful to man and to eliminate characteristics that were undesired. As this process was done over and over again, the dogs became more and more socialized, domesticated, and refined to the qualities that were desirable. This led to more human intervention in breeding along with survival of the fittest to shape the animals .
The wolves evolving into domesticated animals would have reflected traits from the interaction and co-dependence with the human group. Things like length of fur adapting to the weather their human family lived in, perhaps speed and stealth for hunting, swimming for water retrieval/crossing, all types of certain behaviors and physical traits and appearances were evolved into these animals and unique in the dogs within each human group.
Sometimes human groups would trade and breed different dogs for certain traits they wanted and the eventual outcome would be different types (breeds) of dogs.
Because a girl dog has a female part and the boy dog has a male part that's how you can tell from the female dog and the male dog the way you can tell you watch the way they pee. boys stick their leg up and girl don't.
Im sure you mean why do boy dogs lift a leg and girl dogs don't. Well, the answer would be because if boy dogs tried to "go" without lifting their leg up they would just end up peeing on their leg. and somehow they know that they dont want that.
No only a female can fall pregnant with a litter of puppies but if she is desexed then she cant either
I Think Its A Matter Of How They Are Treated.I Have 3 Dogs But 2 Are Outside. My Inside Dog Is A Boy. He Has Been A Pain 2 Train But .....I Think It Pretty Much Depends On The Breed And Patience U Have With Your Pet.. .
Actually, nothing! They could just be playing...its not like they are in "love"
I think that all girl dogs are less aggressive.
depends
boy dogs are usualy louder but girl dogs can be quite sleepy
Boys mostly play football but girls and boy both play their was a girl who was better than a boy COOL
Which is a better companion between a boxer girl dog and a boxer boy dog depends on how well you bond with each. Boxers are wonderful dogs with giant and sweet personalities.
Justin bieber he has two dogs a boy and a girl
Shep is a girl
The main boy and girl/.
a girl is better in sapphire, ruby, and emerald. they have more life and they also nore attack power.
Girl hamsters behave best they are more calm. Boy hamsters like to fight
I'm partial to the Maltese Falcon.
it is both it is better for a boy and a girl