ISA Brown at a glance
Eggs / year
300–340 large brown eggs
Egg color
brown
Egg size
large
Adult weight
5–6 lbs
Temperament
Friendly, productive, calm
Beginner-friendly
★★★★★
Cold tolerance
❄️ Good
Heat tolerance
☀️ Good
Broodiness
rarely
Noise level
quiet
Flight risk
low
Best for
eggs
✓ Pros
- •Most eggs of any breed (~340/yr peak)
- •Beginner-friendly temperament
- •Cheap at feed stores
- •Lay through winter without lights
⚠ Watch out for
- •Burn out by year 2
- •High rates of reproductive cancer
- •Cannot reliably reproduce — hybrid
- •Not a long-term flock investment
Appearance
Reddish-brown body, white tail and underbelly, single comb
Coop & care notes
Standard sizing. Best for someone who treats them as a 2-year laying investment, not lifelong pets.
Coop calculator (pre-set for ISA Brown)
Adjust flock count and climate — sizing math below uses standard-class defaults for ISA Brown birds.
Tell us about your flock
Or autodetect from ZIP:
Housing method
Tap to compare — 3D preview updates live✓ Why people choose this
- •Most space-efficient per bird
- •Easy to clean (you walk in)
- •Strongest predator protection
- •Works in any climate
⚠ Tradeoffs
- •Run gets stripped of grass quickly
- •Birds don't access fresh forage
- •Largest construction project
- •Permanent — hard to relocate
Best for: Anyone with a fixed flock location and 50+ sqft to spare
Live 3D preview
Drag to rotate · use buttons in the corner to reset or skip aheadLoading 3D preview…
Showing: Walk-in coop with run · Rectangle dimensions are suggestions — total sqft is what matters.
Your coop & run requirements
🏠Coop interior
24sqft
~4′ × 6′
🌿Run / outdoor
60sqft
~6′ × 10′
🥚Nesting boxes
2boxes
1 per 3–4 hens
🪵Roost length
5ft
60″ total
💨Ventilation
3sqft
above roost height
🌾Feed needed
39lbs/mo
layer feed
💧Water capacity
0.8gal/day
more in summer
For 6 standard birds:
- Always use 1/2″ hardware cloth, never chicken wire, on all openings.
Recommended supplies for your flock
Sized to your inputs above. Links open Amazon in a new tab.
Coop
PawHut 137″ Split-Level Coop (8–10 birds)
Sized for your 6-bird flock at 24 sqft. Most-reviewed mid-tier coop on Amazon — split-level with attached run.
View on Amazon → Run
1/2″ Hardware Cloth (50+ ft rolls)
You need ~39 linear ft. Predator-proof — chicken wire will not stop a raccoon. Compare current 50-ft rolls.
View on Amazon → Nesting
Best Nest Box — Reversible Rollout (Medium)
You need 2 boxes. The "gold standard" rollout — eggs roll out clean onto a pad, no pecking, no broken eggs.
View on Amazon → Roosting
Heavy-duty roost-bar brackets (use with 2×4 lumber)
6 birds need ~5 ft of roost. A flat 2×4 wide-side-up keeps feet warm in winter; brackets mount it; lumber is cheap locally.
View on Amazon → Feeding
Grandpa's Standard Treadle Feeder (20 lb)
Your flock eats ~39 lbs/mo. Grandpa's is the original NZ-made treadle — 20+ years on the market, the only one BYC moderators endorse.
View on Amazon → Watering
RentACoop 2-Gallon Horizontal Nipple Waterer (4-port)
~0.8 gal/day. Horizontal nipples don't drip, work in cold weather, and the dribble dishes prevent waste.
View on Amazon → Convenience
Run-Chicken T50 Automatic Coop Door
Ranked #1 in 2026 head-to-head tests — easiest install (under 20 min), AA batteries last 1+ year, anti-pinch motor.
View on Amazon → Bedding
Large-flake kiln-dried pine shavings
For 24 sqft of coop floor. Tractor Supply's Producer's Pride bale is the cheapest option locally — Amazon's premium brands work too.
View on Amazon → Health
Harris Diatomaceous Earth Food Grade (10.5 lb + duster)
OMRI-certified, includes a duster applicator. Use in dust baths and sprinkle in nesting boxes for mite/lice control.
View on Amazon → Security
Spring-bolt latch + locking carabiner combo
Raccoons defeat any one-handed latch. The standard recipe is a spring bolt + secondary locking carabiner — two motions, two hands.
View on Amazon → Security
316 Stainless Locking Carabiners (pair with bolt above)
Marine-grade stainless. Use as the secondary lock on every coop and run access point.
View on Amazon → As an Amazon Associate this site earns from qualifying purchases. Recommendations are sized to your flock and based on standard backyard chicken-keeping practices.
