My 9 month old puppy is shedding everywhere. What a mess.

Daily combing should help solve the problem... it is that time of year.
If he has long hair or really thick hair you could cut a little of it or take him to the groomer. I personally don't like to cut their hair really short... I think they need it to help cool off and as a protection against the sun.

Normally dogs shed their summer and winter coats, it also depends on the breed of dog. If it's a lab, I feel your pain! They shed 10 months out of the year! Try using a slicker brush.

It's only natural to shed in the summer. Just regular grooming will help.

What kind of dog do you have, I have a husky and I can go out and brush him everyday and I can get 4 sobeys bags full.

Hi there bush. I was wondering how the coat can help them to cool off?

I'm getting a very furry dog (english cocker spaniel), and our summers can get very, very hot here. Plus, air conditioning is not allowed in this country. :)

Also, any tips for keeping our little puppy cool?

Linn... I first heard it from a groomer.
There is no way I could give you all of the reasons, so I dug up an article on it. Now there may or may not be varying views on this so you will have to just go with your gut.

I have a pom mix and their info about them developing soft undercoat is true and the fact that she sheds that furry little undercooat each spring is true as well. She has never been shaved but really my little chi/rattie sheds more than she does with her long hair. The truth about cats, dogs — and hairballs - TODAY: Pets - MSNBC.com

The simple answer is that air acts as an insulator. Hair traps a layer of air near the skin, which keeps some of the sun's heat from getting to the skin and warming up the blood and tissue.