Hi,
I have a labrador and he's 12 now and i have to say he moults 365 days a year, my house is always covered in hair and i need to hover 2 a day every day.
As for the chewing yep mine did that and was still chewing till he was about 1 1/2, Sorry i can't help but remember he's still a baby at 6 months old so he will chew some things and as for the moulting well that's just part of having dogs, lol.