That's something I was wondering recently - how does the door work in areas with more predators? It doesn't latch or lock in any way, unless I just missed that on account of never needing to.
The leading edge slips in between the plastic sheet of the front and a trim piece cut from the same material, so it is not exposed. A predator would have to be able to pull the string to open it, or have gecko-like hands to stick to the aluminium, *and* know to try to move it in an arc sideways
It just doesn't seem like it would take much snuffling or pawing from, say, a fox to move it just enough to open up a tiny gap. Happy to take your word for it though!The leading edge slips in between the plastic sheet of the front and a trim piece cut from the same material, so it is not exposed. A predator would have to be able to pull the string to open it, or have gecko-like hands to stick to the aluminium, *and* know to try to move it in an arc sideways
it hasn't happened here in 8 years. Also, it wouldn't stay open. I can't see a fox using a paw to draw it aside like a curtain while s/he looks in
and should one manage that here, its nose would probably get a swift and penetrating peck from the roo or old hen on door guard 
yes I've been surprised by that too, when I've opened it just a little with the intention to allow more light in for a broody during hatch while keeping the rest out, only to find someone's squeezed in - or she's squeezed out for a poo! I think if there's enough of a gap for them to get a head in, they can flick it aside far enough to get their chest in, and then they're through.
No flick here, mine just barge in with a slight wiggle at the sticking points
Well, the cord does keep it pulled closed, although I’m not convinced that we ever had it strung exactly right.
