I have two.
The litter (obnoxiously cute)
Around 8 weeks old
Tundra:
Arctic:
Last Week (around 10 months, Tundra 77lbs, Arctic 110!)
Tundra on left, Arctic right:
Arctic:
He LOVES the cat:
Out with friends:
Arctic on left, his mom and dad on the right, Arctic is now bigger than both of them:
Out with one of our other dogs Abby (Bernese Mountain Dog)
They have been easy to train for the most part, though due to their size, they can move a little slow and can be stubborn on the "down" command. However, we have not been training with food rewards.
The female Tundra has bad allergies to several common foods (Chicken and Peanut butter). She's also "moody" and can be downright bitchy to our other dogs. She would be a great in a single dog family. She does OK, but it is a challenge dealing with her quirks with the other dogs. We've got it down for the most part though.
The male (Arctic) is a beast. He's 10 months old and 110lbs already. He's a resource guardian. If there is food, a water dish, the cat, even a person on occasion, he will sit down and growl at any dog that walks by. A few fights have resulted. Again, we have learned to deal with that aspect of his personality and have worked around it.
One interesting problem is their reaction to anything "holding them back" (speaking just about our dogs in particular, not the breed as a whole). If they start barking and acting aggressive to something, if you try to hold them back, they take it up a notch. If you try to "pop" the collar to correct, again, they take it up a notch and get even more aggressive. So, we have had to find other ways to correct and redirect the bad behavior. We found prong collars worked well for controlling them without even needing to issue a correction. If they act up, we just need to jingle the prong collar and they go lay down. We don't even need to put it on them.
Our dogs, however, are not from a breeder. They are from a working line of pyrs from a farm. They weren't really bred out for their temperament in our case. Being working dogs, they also have a different coat than a show line would.
Ours were an accidental litter that a friend of our had (They didn't get around to getting their dogs fixed, they thought they were too young to breed and their female got pregnant) and we got talked into taking two of those cute little bastards :)
In general, they are laid back dogs. They love to play in the yard with our Berner. If it's hot out, they stay in to keep cool. They like playing in the baby pool we have for them. They don't need a lot of exercise and spend most of their time in the kitchen/dining room keeping cool. Our other dogs will walk you unil you drop and want to go back out and walk some more. Our pyrs are crashed out after a walk around the block and are speed bumps the rest of the night.
They can hear better than our other dogs and are very alert. They can hear a dog down the road barking while we are all inside watching TV. This can be a good thing (Early warning alarm system) and annoying too.
Here is what they do most of the time:
Here is a pyr that lives down the street from us (better example of a show line type pyr):
If anyone else out there is looking for a pyr, there is a great rescue here in VA:
http://www.agprescue.com/
ETA: Owning one, much less two is interesting as they generate a LOT of attention when you are out with them. They are like celebrities. Everyone asks about them. Driving around with two in the back of your car also generates questions and laughs in my case (Two giant dogs, sometimes three in the back of my little hatchback, it's like a dog clown car when they all pile out)
We have a dog toy that is a ball with a giant tongue on it, yields funny pictures:
Arctic is great with our son: