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Peep & Pen

Stage 3 — from the move outside, onward

Treadle feeders: the mechanism, the training, and the bantam problem

A lid that opens under a bird's weight is the only feeder design that closes overnight. It is also the only one your flock has to be taught to use.

By Scooter M.·Published September 1, 2026

Chickens gathered around a feeding trough

The short answer

A treadle feeder holds the lid shut until a bird stands on a weighted plate. That is what makes it the only feeder design that is closed overnight, which is what actually removes the rodent invitation. The trade is a published two-week training period and a known problem with light breeds.

How the mechanism works

A hinged plate on the front of the feeder is linked to a counterweighted lid. A bird heavy enough to depress the plate opens the lid; when it steps off, the lid falls shut. There is no electronics, no power and nothing to fail except the pivot.

The consequence is that at night, when there are no birds standing on it, the feeder is a closed metal box. That is the whole product. Everything else — capacity, materials, finish — is secondary to the fact that at 2 a.m. the feed is not accessible.

What the maker publishes

Published specifications for both models.
StandardLarge
Capacity20 lb (9 kg)40 lb (18 kg)
Feeds6 chickens for 10 days12 chickens for 10 days
Eating at once3 to 4 chickens4 to 5 chickens
Dimensions17 x 20 x 11.5 in22 x 25 x 16 in
Empty weight15 lb (6.7 kg)23 lb (10.5 kg)
Minimum bird weight500 g900 g
MaterialsAluminum tread plate, galvanized finishGalvanized steel, aluminum treadle, stainless fasteners
Training2 settings, one week each, bolts includedSame mechanism
Warranty24-month money-back guarantee24-month quality guarantee

The stainless steel fasteners on the Large model are worth noticing. Fasteners are what rust first on an outdoor mechanism, and a seized pivot is how a treadle feeder fails. Publishing the fastener material is a small detail that suggests somebody thought about the failure mode.

Training, in detail

The published procedure is two settings with one week on each, using training bolts supplied in the box. In practice this means:

  1. Week one: the lid is propped open so the birds simply eat from it and learn that this object contains food.
  2. Week two: the lid is partly closed so they have to step on the plate to widen it, connecting the action to the result.
  3. Week three onward: full operation.

Two practical notes. First, remove the old feeder gradually rather than all at once — hungry birds do not experiment, they wait. Second, watch that every bird has learned it, not just the confident ones; a bird at the bottom of the order that has not worked out the plate will lose condition quietly.

The bantam problem

Grandpa’s states plainly that bantams may require a small weight on the tread plate. That is honest and it is also a warning: the mechanism is calibrated for standard breeds, and a mixed flock with bantams in it may end up with birds that cannot open their own feeder.

Grandpa’s does publish the minimum operating weight, which is the figure a bantam keeper needs — but only in its FAQ rather than on either product page, which is why this page missed it until 2026-09-19. The standard feeder needs 500 g of bird on the plate and the large needs 900 g. That difference is nearly double, and it decides the model for a light-breed flock rather than merely warning them. The full Grandpa’s review works through both figures and the unit error in the published imperial conversion.

Where to put it

  • Under cover. A treadle feeder is weather-resistant, not waterproof, and wet feed spoils.
  • On level, firm ground. A feeder that rocks makes the plate inconsistent and the birds lose confidence in it.
  • Against a wall, facing out. Gives the birds an approach and stops the unit being pushed around.
  • Not in the coop. Feed inside the coop draws rodents into the structure you least want them in.

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The short answer

The short list

Ranked on the published rubric. Every row jumps to that product's full write-up below; the button goes straight to Amazon.

#PickBest forKey specScorePrice
1
Grandpa's Feeders Standard Automatic Chicken Feeder, 20 lb

Our pick

Grandpa's Feeders

Standard Automatic Chicken Feeder, 20 lb

A galvanized treadle feeder that publishes exactly what it does — 20 pounds, six chickens, ten days, three to four birds eating at once — and a two-week training schedule that tells you it will not work on day one.

Six birds and a rodent problem20 lb, 6 birds for 10 days8.7of 10
2
Grandpa's Feeders Large Automatic Chicken Feeder, 40 lb

Grandpa's Feeders

Large Automatic Chicken Feeder, 40 lb

Double the capacity of the standard feeder for the same mechanism and the same 24-month guarantee — the version to buy if you ever want to leave the flock for a week.

A dozen birds, or a week away40 lb, 12 birds for 10 days8.5of 10

#ad Prices as of October 18, 2026. Scores are our own published rubric, not customer ratings.

Grandpa's Feeders Standard Automatic Chicken Feeder, 20 lb

#1 · Six birds and a rodent problem

Grandpa's Feeders Standard Automatic Chicken Feeder, 20 lb

A galvanized treadle feeder that publishes exactly what it does — 20 pounds, six chickens, ten days, three to four birds eating at once — and a two-week training schedule that tells you it will not work on day one.

Who it is for. Anybody with four to six standard-breed birds who has found rat droppings in the run and wants the feed shut when nobody is standing on it.

Published specifications

Feed capacity
Storage area holds approx 9 kg / 20 lb of poultry feed
Dimensions
43 cm W x 51 cm D x 29 cm H (17 in x 20 in x 11.5 in)
Weight
6.7 kg (15 lb)
Materials
Aluminum tread plate with galvanized finish; metal construction
Feeding capacity
Will feed up to 6 chickens for 10 days
Simultaneous feeding
3 to 4 chickens eating together at one time
Training
2 settings with one week on each setting, using the included training bolts
Pest exclusion
Cantilevered lid prevents access by sparrows, rats, mice and other pests
Bantams
May require a small weight on the tread plate
Minimum bird weight
500 g to work the treadle (published in the FAQ as "500grams/14oz"; 500 g is 17.6 oz)
Warranty
24-month 100% money-back guarantee

Source: Grandpas Feeders, Standard Automatic Feeder product page (grandpasfeeders.com), retrieved 2026-09-01 and re-read 2026-09-19; minimum bird weight from the Grandpas Feeders FAQ, retrieved 2026-09-19

Rubric — 8.7 / 10

  • Capacity honesty9/10 · weight 26%
  • Documentation9/10 · weight 24%
  • Build and weather9/10 · weight 20%
  • Running cost9/10 · weight 15%
  • Daily use7/10 · weight 15%

What it gets right

  • Publishes a birds-and-days figure rather than just a capacity, which is the number you actually need
  • Three to four birds at once is published — that is the spec that decides whether the bottom of your pecking order eats
  • A stated two-week, two-stage training procedure with the hardware included, which is honest about the real adoption problem
  • Galvanized steel and an aluminum treadle, in a category full of thin painted sheet

What it costs you

  • Two weeks of training means two weeks of feed still available to rodents while the flock learns
  • The maker notes bantams may need a weight added to the treadle, so light breeds are a known edge case
  • 15 lb empty and 35 lb full is not something you casually move
  • The minimum bird weight is published only in the FAQ, not on the product page, and its imperial conversion is wrong: the figure is given as "500grams/14oz", but 500 g is 17.6 oz

Skip it if. Your flock is bantams or very light breeds. The maker's own note about adding weight to the treadle is telling you this is a marginal fit.

$219.95 · View on Amazon

#ad Price as of October 18, 2026. How this is funded.

Grandpa's Feeders Large Automatic Chicken Feeder, 40 lb

#2 · A dozen birds, or a week away

Grandpa's Feeders Large Automatic Chicken Feeder, 40 lb

Double the capacity of the standard feeder for the same mechanism and the same 24-month guarantee — the version to buy if you ever want to leave the flock for a week.

Who it is for. Ten or more birds, or anybody who wants to be able to go away for a week without a neighbor visiting.

Published specifications

Feed capacity
Large storage area holds 18 kg / 40 lb of poultry feed
Dimensions
55 cm W x 63 cm D x 40 cm H (22 in x 25 in x 16 in)
Weight
10.5 kg (23 lb)
Feeding capacity
Feeds twelve chickens for ten days
Simultaneous feeding
4 to 5 chickens eating together at one time
Minimum bird weight
900 g / 2 lb to work the treadle (FAQ)
Materials
Galvanized steel with aluminum treadle and stainless steel nuts and bolts
Warranty
24-month quality guarantee

Source: Grandpas Feeders, Large Automatic Feeder product page (grandpasfeeders.com), re-read 2026-09-19 — dimensions and weight corrected from the 2026-09-01 figures; minimum bird weight from the Grandpas Feeders FAQ, retrieved 2026-09-19

Rubric — 8.5 / 10

  • Capacity honesty9/10 · weight 26%
  • Documentation8/10 · weight 24%
  • Build and weather9/10 · weight 20%
  • Running cost9/10 · weight 15%
  • Daily use7/10 · weight 15%

What it gets right

  • Twelve birds for ten days published, which is the only capacity figure here that covers a real vacation
  • Stainless steel fasteners are published, and fasteners are what rust first on outdoor feeders
  • Same treadle mechanism and pest exclusion as the standard model

What it costs you

  • 23 lb empty and over 60 lb full — this is a fixed installation, not something you carry in daily
  • Forty pounds of feed sitting out is forty pounds going stale if your flock is small
  • The treadle needs 900 g of bird against the standard model's 500 g — nearly double, and the reason a bantam or light-breed flock should not buy this size

Skip it if. You have six birds. A 40 lb hopper means your feed sits for three weeks, and feed does not improve with age.

$269.95 · View on Amazon

#ad Price as of October 18, 2026. How this is funded.

FAQ

Questions people actually ask

How do treadle chicken feeders work?

A hinged plate on the front is linked to a counterweighted lid. A bird heavy enough to depress the plate opens the lid, and the lid falls shut when it steps off. There is no power and nothing to fail except the pivot, and at night with no bird on the plate the feeder is a closed metal box.

How long does it take chickens to learn a treadle feeder?

Grandpa's Feeders publishes a two-stage training procedure of one week on each of two settings, using bolts included in the box — two weeks in total. Remove the old feeder gradually rather than all at once, and check that timid birds have learned it too, not just the confident ones.

Do treadle feeders keep rats out?

They shut the feed away when no bird is standing on the plate, which removes the overnight invitation that draws rodents in the first place. Grandpa's publishes that the cantilevered lid prevents access by sparrows, rats and mice. It does nothing about spilled feed on the ground or the sack in your shed.

Are treadle feeders suitable for bantams?

Marginally. Grandpa's states that bantams may require a small weight added to the tread plate. No maker in this category publishes a minimum operating bird weight, which is exactly the figure a bantam keeper needs, so this is a known edge case with no published answer.

Where the numbers came from

Sources

Every figure cited on this page came from one of these documents. If one of them has changed since we read it, the number here is out of date and we would like to know.

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