What do you think did this?

[abby]

And how do I stop the little bleepers doing it again?

[Capsid]

Can you make the picture bigger? If you mean the holes at the bottom then it could be woodpeckers. To stop them you can cover with metal.

[Flummery]

Woodpeckers do enlarge the holes in nice man-made nest boxes. As Capsid says, cover the hole with a metal plate in which you have made a hole the size YOU want. You can put it on the inside if it spoils the look of your box.

We had a woodpecker in the village pecking furiously at the top of a pole which was covered in metal sheeting. You could hear him at the other end of the village!

[abby]

Hope this is a bigger picture as I am rubbish at this stuff.

The hole is at the bottom of the box and I will try as you advise and put metal over it thanks...

[Flummery]

Could be anything - most rodents will chew wood. I still think a metal plate inside will blunt their appetite!

[abby]

And their teeth lol...

[Tam]

Could be a squirrel

[Pies]

its either a flying rat or woody.metal plate best dererant