my impression is that an ideal amount space is based mostly on the need for coop cleanliness (esp in regard to chicken health), and not entirely on chicken "feelings". but, i think a chicken's "need for space" might change with age and season.
at the moment, i have 6 pullets, all getting close to starting, in a 12 sq ft coop. they go in only at night and pile on top of each other and take up only about a third to half of the space... the actual proportion depending on their mood, i think
. i believe that this small amount of space works for now mainly because i change their hay/straw substrate frequently and because it's really cold out, so the microbial and parasite growth is slowed. also, they're still a little young, and probably don't need their separate spaces (e.g., nesting boxes) quite as much yet.
i'm building a larger coop with nesting boxes that they should have well before warmer weather hits. i am shooting for around magic number of 4 sq ft per chicken for the new coop. i'm hoping that will be enough for summer's heat, but intend to include adjustable ventilation to help. fortunately, the new coop is taller too, so there'll be addition roosting space. even though this doesn't change the scat per area (SPA
), i think it provides effectively more space for birds because it gives them a chance to get off the substrate.
anyway, so my current theory, being a novice at this, is that actual ideal amount of space might be a function of cleaning frequency (less frequent --> more space better), ambient temperature (lower temp --> less space better), and chicken maturity (more space with age), and that 4 sq ft is a long term balance between these considerations for fully grown birds. i'm sure building cost plays a role too. but, this is all guess work on my behalf and i'm feeling my way through this based on what i see and read. so, i asked the experts, do those dependencies sound about right?
also, i suspect that 4 sq ft might not always be best (i've read posts where 4 sq ft lead to popsicle chickens in extremely cold environments), it just works best for most situations. that's probably why that value seems up for debate at times. but, i'm going on the prevailing wisdom of 4 sq ft for my new coop and using other design considerations to help adjust for seasonal changes (e.g., adding heat and insolation for extremely cold weather, if necessary, and vents for summer) and being careful about keeping up with cleaning.