Ammonia smell in coop-first time owner

[Denise30]

Last night we lost 7 chickens in our Omlet Go coop with it’s Omlet attached run. The fox did not dig under the skirting, it broke the coop door at the back! I am baffled and in shock and would like to know how on Earth was that possible?! 

[GMac]

Hi. I'm so sorry about your chickens. I'm very new to chicken keeping but definitely feel the back door of the cube is a design fault. It's easily pulled out from the bottom. I wrap a very tight bungee cord around the level of the litter tray and fasten with carbiner clips as I feel nervous about that back opening 

[Sad Owner]

It was probably a racoon? I'm sorry this happened too, my Omlet Cube also failed and got all 40 of my chickens where I was brooding them.

[Denise30]

No it wasn’t a racoon, we are in UK, and it wasn’t a fox either! Turns out it was actually a mink or a polecat! We found evidence… We now have set (humane) traps to catch the culprit and send it somewhere else where they can’t harm any pet chickens.
I have been in touch with Omlet and although the lady I spoke to was very nice , the only thing they did for me was to send a replacement back door for the coop!?  And a promise that she will pass the case to the management and design team. Turns out Omlet coops are not 100% predator proof