How many nesting boxes?

[OCD]

I just got my first coop and the nest boxes have low walls. Does anyone know if I need to make the walls higher? Do they like to be more closed in? There are 4 boxes in a 4 foot long wall.
Thanks for any input!

 

[monarchcmj]

Quote:
That is such a great picture! My husband and I have been wondering how many nesting boxes to put in our coop... I'll have to show him this picture