We have a 14 week old Golden retriever, when we got him, he seemed calm and sociable.
But during the last few weeks he has become a bit aggressive and will not stop biting.
We have took him to puppy class and tried out a number off different methods to try and stop his biting but nothing seems to work and he is getting worse.
Does anybody have any advice about how to stop it?
Many thanks :)

> But during the last few weeks he has become a bit aggressive and will not stop biting.
>

This is normal puppy behaviour, it's just play-biting. It's how he would play naturally with other dogs.

Here is The Bite Stops Here

This should put your mind at rest and also advises on how to tackle this. You'll notice in the article that you need to teach pup to limit the force of his bite before you get him to stop biting all together, it also explains why.

Hope this helps & welcome to the forum :)

ETA teaching the pup to control the force of his bite and then stopping his biting of humans is nothing to do with any dog-dog interaction he gets, it's all about teaching how he can/can't play with people :)

You really should be finding out the diff between Play biting and aggression. 
how long did you take your pup to class.  till you find out if this is aggression (I doubt it is, i hope not anyway with one so young) i dont want to give any advice.
you also need to look at your pups daily 'timetable' is he/she getting enough play with other pups his size? what training are you giving him, he needs mental stimulation to work that brain.

have you asked your breeder for advice?

A decent, experienced Golden retriever owner in  your area ought to be able to visit & give you some advice if the breeder is too far away. A good puppy class trainer also ought to be able to help. What area are you? I might be able to find someone to help. I very much doubt that he is being aggressive. Golden puppies wrinkle their noses & "growl"at their owners in greeting and all puppies play bite.  New Golden owners just don't understand this sometimes. Please get help before you lose confidence in him.

http://www.apdt.co.uk/documents/Playbiting.pdf

I also advise owners on specific moments such as, for example, pup pouncing when they come down the stairs - simply scatter kibble and the pup will be distracted... this isn't "rewarding" the pup if you do it before the biting/nipping actually starts, but it is getting good habits under way :)

You can also use soft dog toys/tuggies to distract them and increase the likelihood of the puppy grabbing the toy instead of the human! Very useful for the future too, when the dog experiences frustration, as they are likely to grab their toy at that time.

Hth. It is normal and just needs working through. It may get worse before it gets better (extinction burst) and this, too, is normal. Expect it to get worse around 14-16 weeks, and to see an improvement around 19-22 weeks (very roughly speaking and depending on your dog/breed/character etc).

Lindsay
x

that was a great article,mastifflover,makes so much sense .Gwen has never mouthed and playbitten me-I put it down to her being 11weeks when I got her(more chance to play with siblings)and the fact she was raw fed,with plenty of bones!She seems quite laid back,and she and Jess do the usual playfighting!_I do hope Im not storing up trouble here!Jess used to use my hands like chewing gum!So I was relieved-and now Im not so sure!