heat tolerant

I don't think it matters when they are born. They may get better conditioning from the natural heat of the summer. But give any dog time to climatize and he will do better hot or cold. Don't think it will last a life time. This is just my opinion. I do not like to tend to puppies in 100 degree weather. What I have noticed is hyper,excited dogs go out fast. Layed back,or experinced dogs will last longer. I know that sounds obvious. But those who are line breeding can put a little too much in a dog and end up with one that will be short winded same in horses. You got to cool that blood off once in a while. This will probably stir some one up. But bark and bite won't do much good with out the stick.unless you hunt 50 acres or a rodeo cowboy.