dirtyharry said...
50mm doesn't seem much, but I reckon foxes and cats would be crafty buggers
Believe it. Foxes especially...
In the end we rigged up an automatic chook door closer with an electronic timer, a washing machine solenoid, springs and latches, to close the door at 6pm... if it was left open longer than that the foxes would jump in and grab a free feed. And that was after we built the hilton with a proper concrete slab, metal cladding, the works.
They do burrow, they can get through something you wouldn't think twice about, and they can enlarge a hole if you let them. They often make holes in fences so they can go about their nightly business.
Crafty, cunning, and they just looooove a nice chicken dinner