I Have two non-working border collies as pets ,and they currently get 22% protein in there food.Is this too much or does protein percentage really not matter that much as the all seem to vary from 18% to about 25%.Does anyone take an interest in the protein percent in there dogs food .Thanks for any advice .

The important thing is: does it suit them? How old are they? Are their activity levels how you want them? If they're adult and you're happy with their behaviour (ie they're not hyper), then all's well. :)

FWIW I personally do not believe that protein percentage as shown on the bag label is of any particular use.  It does not reflect a) the quality of the protein ie complete or incomplete, b) the bio availability of it for the dog.

It has been received wisdom for a number of years that protein levels per se  are somehow inextricably linked to behavioural issues, there are currently no proven valid studies to uphold this view that do not also contain a number of other variables which need to be removed from the equation for a meaningful result.

If protein content per se was indeed the major factor in behavioural issues one would expect that those animals that live in the wild or indeed in captivity such as zoos to reflect this hypothesis as their diets consist of raw meat and bones.  They do not.

Therefore I would not worry if I were you.

I only take an interest if I think it is affecting my dogs behaviour (and not just normal juevenile boistrousness), occasionaly you seem to get a dog that benefits from a lower protein level but otherwise if the foods is suiting them I would not be at all bothered.

Do you think a smaall difference in protein can make a difference in behaviour problems

There are those who are convinced it does and those who aren't. But you might find it useful to do a search for "protein" and read some of what has been said on here.

bendonagasaki, I have yet to see anything that irrevocably ties in protein content to behavioural issues, generally speaking those "studies" that claim so to do have unfortunately failed to take into account other factors in the equation such as the other ingredients and how they act on the body a) in isolation and b) synergistically with other ingredients..............

Personally I think that it has more to do with the accessibility of the protein in the food. If it is easily accessible they need less of it, however there is no direct indication of this on the lables. It you are looking for something that affects behaviour I would look at the additives first. But if they are doing well on what you are feeding why change?

imo BCs generally do very well on a lower protein than that, behavoiural & coat condition etc.
Do you have a specific problem ?
what are the poohs like?

My older border collie has fear aggression ,i prefer to feed them dry food so what lower protein food would you recomend and do you think it can help with that.I know its not the oonly answer to his fear aggression but we are doing other things

Burns has a lower protein level than many dry foods.   Pretty much any of the light or and many of the senior varieties of dry foods also have lower protein levels.

I'm in the camp that a lower protein level makes no difference in behaviour. 

Stacey