Newly temperamental husky

(US)

Hi! I have a 14 month old pure Siberian husky named. He is my baby and has been a super friendly dog ever since I got him at 7 weeks. We have always gone to the dog park daily and he was always everyone's friend and non confrontational,, he just loves to play and chase, he even has his own kitten that he cuddles with in private lol. the only issue I ever had with behv would be stealing water bowls and occasionally he would get a little too rough but as soon as the other dog would express that it didn't like it he would run away like a chicken.

I recently went away for a week and left him with a Friend who has two dogs,
they are super friendly dogs, however are very possive and the one can have a bit temper and will snap at other dogs, usually is mostly noise but holds them down by the neck. We had gone over several times before leaving and they all seemed to get along well. When I got home there were no reports of them getting into it, however they may just not have wanted to say, also have a much different approach with their dogs than I do which I now know and did not before but lots of screaming and smacking a newspaper off of the table? ( my dog does not respond well to this he's more of a look and handsignal kind of guy haha.)

Anyhow since being home he has been like a different dog and not in a good way :( he's still great at home! However is supper skiddish all of the sudden, if I call his name he thinks he is in trouble ears back head down, where as he use to be the poster child of happy go luckily super bold followed me room to room tail always wagging. And now he is like a bump on a log at home not excited about anything or near as playful and energetic, barely comes when I call because he's scared. Loud noises he jumps. Then we go to the park and he is his usually happy play with everyone self like always but is now snapping at other dogs out of no where over nothing, not hurting them by any means but it sounds aweful and toward little pups that can be terrifying. I never had to worry about this before and I want to correct the behavior before it becomes a problem and he snaps at the wrong dog and gets himself bit. Any ideas/tips/ insite on how to correct the behavior, help him get recomfortable at home, anything ha. I'm just not sure if it's him getting older or if it is in response to the other environment he was in but either way he won't be staying there again just in case.

Thank you!