Temperament is not something that a dog is 
	  born with which will remain the same for the rest of its life.
It will 
	  change over a dogs lifetime.
	  Genetics has something to do with it but socialisation, handling, 
	  environment, lifestyle, training and life experience all play a part. The 
		biggest part is played by humans. 
We see dogs from parents with very good temperaments that turn into nasty 
	  fighters around other dogs or end up biting people. Pups from parents that 
	  have a reputation for being unsocial nippers or biters can end up as the 
	  most gentle, kind dogs with no hint of their parents aggression.
It is often said that you should look at the parents temperaments in order 
	  to have some idea of how the pups will turn out.
	  This is not necessarily true.
There is a saying in sheepdog circles regarding pups and their parents
	  "Its not what you've got, it's what you've had" 
	  which means its not the parents you should be looking at, it's the 
	  grandparents.
Either way you look (and we would advise you to look both 
	  ways) what you see in a bloodline is only an indication of what the dog 
	  may turn out like as it grows.
Pups from the same litter sometimes end up 
	  either end of the scale.
To generalise, Border Collies, as a whole, have very amiable temperaments 
	  when properly bred exercised and mentally stimulated.
	  They are normally a quiet and thoughtful breed, very loyal to their owners 
	  and often forming a strong attachment, particularly if dog and owner spend 
	  time doing something fulfilling for the dog.
To keep a balanced temperament the dog will need some downtime, or 'me' 
	  time to itself, preferably at night, in a place where it feels secure and 
	  relaxed.
Dog crates under a kitchen unit or stairs or just covered over 
	  top, back and sides performs this function.
If frustrated or wound 
	 up Border Collies can be easily stimulated into 
	  hyperactivity.
Being an intelligent breed, strong leadership is required to enable them 
	  to feel confident that their needs will be attended to so they do not 
	  start to think that they have to make their own decisions about personal 
	  space, exercise, sleeping arrangements and food.
Once a Border Collie gets into this frame of mind it takes some convincing 
	  to get its mind changed and this is where temperament issues begin to 
	  raise their heads.
They can become possessive over space and food and 
	  aggressive if they feel their rights in these areas are compromised.
	 
Exercise is essential for the long term health of the dog but there is no 
	  point in walking your Border Collie 6 miles a day morning and evening if 
	  you do not provide it with mental stimulation. Mental stimulation is far 
	  more important.
If you are a runner or jogger and train daily putting in a few miles as a 
	  steady pace this will provide some of the mental stimulation a Border 
	  Collie would need because it would see the session as working in 
	  partnership and enjoy it as such, but walking is rather boring and the 
	  chances are that if you just walk your Border Collie daily and allow it to 
	  run around a bit, when you get home it will be ready to go out again 
	  immediately.
Frustration from lack of mental stimulation - boredom if you like - is 
	  going to have an adverse effect on a dogs temperament.
	  
Border Collies are not a breed to share space with young children.
They 
	  can grow intolerant or envious or over protective very quickly, all of 
	  which lead to problems.
The crying of babies can frighten, confuse or 
	  simply overstimulated them up as can the jerky movement of toddlers.
The 
	  high pitched voices and quick movements of youngsters can also stimulate 
	  instincts best applied to working sheep and they can become 'herdy' and 
	  nippy.
Boys tend to cause this more than girls, perhaps because they are 
	  more inclined to hyperactivity than girls.
In some cases a Border Collie can become overprotective of their owners and consider a 
	  child to be a threat and in some cases they will consider the child to be 
	  lower in the family pecking order that they are and subject to their will.
As young children often lack the confidence and capability to control a 
	  dog they can easily find themselves on the wrong side of a Border Collies 
	  tolerance level and end up being bitten.
Couple this with their size in comparison with a Border Collie and the 
	  proximity of their face to the dogs, it is a serious risk.
Instinct plays a great part in a Border Collies temperament as does 
	  socialisation as a puppy and subsequent handling and training.
	  Bear in mind that everything you do with, and to, a Border Collie is 
	  training it, so consistency is very important.
A dog with strong sheepdog instincts and no way to fulfill them will 
	  become frustrated and its temperament, even if initially it was very happy 
	  and tolerant, will retrogress.
Instinct to herd is common, to one degree 
	  or another, in most Border Collies.
Instinct to herd is not one inclination, it is a combination of of factors 
	  all of which will ultimately affect a dogs temperament if not considered 
	  and accounted for in its handling.
Chasing, retrieving, flanking, eying, 
	  working with handler, an association and bond with one individual, all 
	  contribute.
	  Individually and collectively they make an individual Border Collie pups 
	  temperament difficult to accurately pin down.