How many have seen a 4 month old terrier puppy with a slight over bite and its turned out ok.
I looked at a pups upper & lower incisors today they are through but with a slight over bite mainly the two centre upper incisors. I know the lower jaw grows on slightly, it's the ladies  dog and she's got a panic on as she wants to show.

Ive seen a Lakeland pup with a good scissor bite but when it reached 6 months the mouth was level but never seen a slight over bite in a young pup.

I just wondered how many would be worried if at 4 months their pups bite was slightly over.

Your comment about the lower jaw growing on for longer than the top jaw is true. I know nothing about terriers but in most breeds, it wouldn't correct itself. If the lady doesn't love the puppy for himself, she should let him go to someone who will.

Do you mean the top teeth overlap more than for a scissor (overshot) this can correct as the lower jaw grows.

If pups lower teeth are in front of the upper (undershot) this is likely to only get worse as the lower jaw grows more.

Yes, top teeth overlap to far to give a good correct scissor bite. Ive seen pups with a level bite end up undershot but never pups with top teeth completely overlapping bottom teeth.
I told her I know the bottom jaw grows on slightly but didn't want to say it will come right as Ive never seen it my self.

Alot of people dont like to look when thair pups are teething.

I never look while they are actually teething as the teeth are all over the place with new and old in situ

In collie's never used to worry about a it as when the bottom jaw finished they were usually perfect I would worry more if too perfect to early or level bit.

As said, I'd be more concerned about an underbite as the lower jaw does continue growing after the top jaw has stopped.   If he has a 'slight over bite' it may well go to a scissor bite eventually.   This is a hereditary problem, so if either parent, or back of them, has a bite problem, it will be seen in some of the puppies.  Unfortunately.  For this reason, usually it's not a good idea to breed from anything with an incorrect bite.

I tend only to look if I am concerned I've picked up this fault in a particular breeding.  It is very much a no-no in my breed (in the UK where only a scissor bite is acceptable.  In Canada they'd accept edge to edge, but it's still not a good idea because if too much edge to edge breeding is done, together, it can develop into an underbite problem in that bloodline).  So it does need checking.

> I just wondered how many would be worried if at 4 months their pups bite was slightly over.

In borzois and silkens I prefer them to be very slightly overshot at that age, usually means they will have a good scissor bite when adult. Although terriers do mature faster I still wouldn't worry about it just now.

Flatcoats are almost always slightly overshot at that age - the bottom jaw catches up by about 6 months usually.

Jo