
We have a Pyrenean Mountain Dog as well. We got him at 2 1/2 years old. He does not like other dogs too much, although he now tolerates most! He loves his "brother" though and he loves people too. He too is a PAT dog.
If you would like to find out more about pyrs, you may want to go and have a look here: http://www.proudpyreneans.co.uk which is a forum for pyr owners and lovers.
Vera