Teeth grinding

just wondering if anyone can shed some light on this, I've noticed that when Marley open and closes his mouth I can hear teeth grinding? I thought it was just a one off but it's everytime, I checked his teeth and the ones that are grinding on each other are the two long front ones with the two long bottom ones. I felt his top teeth and I can feel I line on both from where they are rubbing, is that normal or is there something wrong? Marleys bottom half of teeth over lap the top? Thanx

Sounds like a bit of an under-bite issue. I'd ask a vet if there is anything you should be doing.

Check with the vet to check if theres anything you can do

This definitely something going on you hear is everytime he open and closes his mouth it's not bothering him tho just me being paranoid my oh check his teeth today and he reckons the bottom and top line up but I'm sure when I look this morning the bottom overlapped the top, thanx guys I'll ask the vet