Smells

[3KillerBs]

It smells because there is not enough ventilation.

This.

Eglu coops are better-built than the usual prefab but, like almost all prefabs they wildly exaggerate how many birds they and hold and are woefully under-ventilated.

Here's my article on coop ventilation: https://www.backyardchickens.com/articles/repecka-illustrates-coop-ventilation.77659/

I have 6. One Roo five hens in the extra large eglu.

The Usual Guidelines

For each adult, standard-sized hen you need:

• 4 square feet in the coop (.37 square meters)
• 10 square feet in the run (.93 square meters),
• 1 linear foot of roost (.3 meters),
• 1/4 of a nest box,
• And 1 square foot (.09 square meters) of permanent, 24/7/365 ventilation, preferably located over the birds' heads when they're sitting on the roost.

4 hens

• 16 square feet in the coop. 4'x4' is the only really practical build for this given the common dimensions of lumber.
• 4 feet of roost
• 40 square feet in the run. 4'x10' or 5'x8'. 6'x6' is a bit too small, 6'x8' is more generous and easier to build than 5'x8'.
• 4 square feet of ventilation. A 2'x2' window is theoretically enough, but in practice doesn't create any air FLOW so better to spread the venting around (and even better to exceed the minimums, especially in warm climates).
• 2 nest boxes, to give the hens a choice

6 hens

• 24 square feet in the coop. 4'x6' is the only really practical build for this given the common dimensions of lumber. If you can't walk into it, put the access door in the middle of the long side to make sure you can reach all areas of the coop because a stubborn chicken WILL press itself into/lay an egg in the back corner where you can't reach.
• 6 feet of roost
• 60 square feet in the run. 6'x10' or 8'x8'.
• 6 square feet of ventilation.
• 2 nest boxes, to give the hens a choice

Dry chickens which are not overcrowded in a coop with plenty of ventilation don't stink.

 

[Quimby House]

I have an Omlet Eglu Cube for 4 hens and change out the slide out poop board shavings once a week. The chickens only are in the coop to sleep. And it does not smell. So I'm very curious about your situation.
How many chickens do you have? Are you keeping your chickens in the coop during the day? Also during the day you can try leaving the big 'backdoor' open. I always have mine off during the day when their 'front' flip door is open.

I have 5 hens 1 Roo.

I open the door at 7 am. They are out amd about until they return themselves to bed at sun set.

I will try the back door thing. They don’t have to be in the coop all day. They have a lot of places to hang out but they do sometimes stay in the coop. Their own choice

 

[Tonyroo]

Use PDZ in your coop, it's similar to sandy cat litter but works better to dry and deodorize chicken poop.