Chicks and adult hens at a feeder with pelleted feed

Poultry Feeders and Feed Waste: Where Every Tenth Bag Goes

How much feed is lost from a full feeder, how high to hang it, how much space birds need, what rats and sparrows cost you, and how to measure waste on your own farm.

Look under the feeder. If there’s a layer of feed the birds no longer pick up, that’s your money. On a small farm 5 to 15% of feed misses the beak, and feed is two-thirds of the cost of an egg. In other words, you buy every tenth bag for the floor, the rats and the sparrows.

A full feeder is the biggest mistake

A hen searches with her beak, flicks feed aside and drops what she can’t hold. The higher the feed sits at the rim, the more of it flies out. Poultry-keeping guides give these figures for trough feeders:

Trough filledFeed wasted, roughly
To the brim30–45%
Two-thirds10–12%
Half3–5%
One-third1–2%

Sources differ on the exact numbers but agree on the point: filling less and more often is cheaper than filling to the brim once a day. Fill a trough no more than one-third full.

Height and space

Which feeder is better

TypeProsCons
Open troughCheap, you can see what’s leftMore waste without a lip or spinner
Hanging tube feederHolds several days, stays cleanEasy to miss that it’s empty or caked
With an anti-scratch grillBirds can’t climb in and scratchTakes longer to wash
Treadle feederFeed is out of reach of sparrows and ratsBirds need training, costs more

A simple trick for any open feeder is an inward-curled lip or a spinner bar over the trough. It often halves the waste.

Mash or pellets

From mash, a hen picks out the coarse particles and leaves or flicks out the fine dust, which is often where the premix and meal are. Pellets and crumbles can’t be sorted and get dropped less. If you feed mash, let the birds clean out the feeder before you add more.

Rats, mice and sparrows

A rat eats 15–30 grams of feed a day and, by most estimates, spoils several times that with urine, droppings and hair. A dozen rats in the shed is a couple of hens’ worth of feed every day, plus salmonella. A flock of sparrows at an open feeder eats less but brings mites and disease.

How to measure your own waste

Two ways — ideally both.

  1. Feed per bird. If layers “eat” 140–150 grams when the strain guide says 115–120, the difference is almost all on the floor or with the rodents.
  2. Stock reconciliation. Bought this month, minus what’s left, minus what the log says was fed — how much vanished? This is covered in detail in the feed inventory article.
What it costs

200 layers eat about 24 kg a day. 10% waste is 2.4 kg a day, almost 900 kg a year. A new feeder with a lip pays for itself in a couple of months.

Waste in numbers

In EggPulse the day’s feed is divided by the head count, and analytics shows feed per 10 eggs by house. When you change feeders, you can see how much consumption dropped — and whether the change was worth it. Per-bird norms by age are in the feeding norms article.