Store feed in a container with a threaded, gasketed lid rather than in the sack it came in. Gamma2 publishes food-grade BPA-free HDPE with a double-gasket Gamma Seal on the Vittles Vault Outback, in a 40 lb size that swallows a whole feed sack at 21 by 12 by 17 inches.
Rodents follow the smell, not the opening
The instinct about feed storage is to make it hard to get into. That is worth doing, but it is the second thing. The first is that a rodent has to decide your shed is worth investigating, and what makes that decision for it is smell.
A paper feed sack, or a bin with a loose snap-on lid, broadcasts grain smell continuously. An airtight container does not. Removing the invitation is a different and better strategy than winning an arms race with an animal that has all night and nothing else to do.
What Gamma2 publishes
Published specifications for both sizes.
Outback 40 lb
Outback 20 lb
Capacity
40 lb
20-25 lb
Dimensions
21 x 12 x 17 in
12 x 12 x 9.75 in
Empty weight
Not published
4.18 lb
Material
Food-grade HDPE, BPA-free
BPA-free food-grade plastic
Seal
Gamma Seal, threaded lock, double gaskets
Gamma Seal airtight
Stacking
Up to two high
Not published
Origin
Made in the USA
Not published
Warranty
Not published
Not published
The threaded lid with double gaskets is the mechanism that matters. A snap-on bin lid can be levered by a raccoon and is rarely airtight even when new; a screw lid with gaskets is both harder to defeat and actually seals. Food-grade HDPE and BPA-free are worth having published too, because feed sits in this for weeks.
What a plastic container does not do
It is not rodent-proof in the sense a galvanized can is. A determined rat will chew HDPE given enough nights and enough motivation. The seal removes the motivation, which works on a rodent that has not yet established itself and works less well on a population that already knows the feed is there.
If you already have an established rat problem, start with a galvanized metal can with a locking lid, and read the rodent page — which is about removing food sources rather than about killing rodents, because the second does not work while the first is available.
You need more than one
This is the thing nobody plans for. By month three a typical keeper is storing: layer feed, scratch, grit, oyster shell, and probably mealworms or another treat. That is four or five separate things, all of which need to be dry and all of which are much smaller quantities than the feed.
A 40 lb container for the main feed and a 20 lb one for the supplements is the usual shape. The small ones can also be jars, buckets or anything sealed — the argument for a matching container is stacking and consistency rather than function.
Where to keep it
Cool and dark. Vitamins in feed degrade with heat and light. A sunny shed in July is the worst common storage location.
Off the floor. Concrete floors sweat and the bottom of a container in contact with them stays damp.
Not in the coop. Feed inside the coop is an invitation into the structure you least want rodents in.
Rotated. Feed has a shelf life measured in weeks to a couple of months. Buy what your flock eats in that time — at roughly a third of a pound per bird per day, six birds get through 20 lb in about ten days.
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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.
#
Pick
Best for
Key spec
Score
Price
1
Score8.4
Our pick
Gamma2
Vittles Vault Outback, 40 lb
A food-grade HDPE drum with a threaded double-gasket lid that swallows a whole 40 lb sack — the container that ends the rodent argument by removing the smell rather than the rodents.
The small version, and the honest use for it is not feed at all — it is the second and third container you need once you are also storing grit, oyster shell and scratch.
#ad No live price feed on this build yet, so every button reads “check price” rather than showing a figure we cannot stand behind. Scores are our own published rubric, not customer ratings.
Score8.4no photo yet
#1 · A whole sack of feed, sealed
Gamma2 Vittles Vault Outback, 40 lb
A food-grade HDPE drum with a threaded double-gasket lid that swallows a whole 40 lb sack — the container that ends the rodent argument by removing the smell rather than the rodents.
Who it is for. Anybody currently storing feed in the paper sack it came in, which is most first-year keepers.
Published specifications
Capacity
40 pounds
Dimensions
21 in L x 12 in W x 17 in H
Material
Food-grade HDPE plastic, BPA-free, resists shattering and cracking
Seal
Gamma Seal threaded locking system with double gaskets
A threaded, double-gasketed lid, which is a genuinely different mechanism from a snap-on bin lid that a raccoon can lever
Food-grade HDPE and BPA-free are both published, and feed sits in this for weeks
The tall narrow footprint suits a coop corner far better than a wide tote
Rodents are drawn by smell before they are drawn by access; an airtight seal removes the invitation
What it costs you
Plastic is not rodent-proof in the way a galvanized can is — a determined rat can chew HDPE given time and motive
Twenty-one inches long needs planning if the storage spot is a narrow gap
Gamma2 publishes no warranty on the Outback line
Skip it if. You already have an established rat population working on the feed. Start with a galvanized can with a locking lid, then keep this indoors.
#ad No live price feed yet, so no number is shown rather than a stale one. How this is funded.
Score7.7no photo yet
#2 · Grit, oyster shell and scratch
Gamma2 Vittles Vault Outback, 20 lb
The small version, and the honest use for it is not feed at all — it is the second and third container you need once you are also storing grit, oyster shell and scratch.
Who it is for. Anybody past the first month, when grit, oyster shell, scratch and treats all need somewhere dry to live.
Published specifications
Capacity
20-25 lbs
Dimensions
12 in x 12 in x 9.75 in
Weight
4.18 lb
Material
BPA-free food-grade plastic
Seal
Gamma Seal airtight technology
Other features
Weatherproof, insect and pest-proof, molded-in handles
#ad No live price feed yet, so no number is shown rather than a stale one. How this is funded.
FAQ
Questions people actually ask
+How should chicken feed be stored?
In an airtight container with a threaded gasketed lid, kept cool, dark, off the floor and outside the coop. The seal matters more than the strength of the container, because rodents follow the smell of grain before they look for a way in — removing the smell removes the reason they investigate.
+Are plastic feed containers rodent proof?
Not against an established population. A determined rat will chew HDPE given enough nights, so an airtight plastic container works by removing the smell that draws rodents in the first place rather than by being impenetrable. If you already have rats, use a galvanized metal can with a locking lid.
+How long does chicken feed stay fresh?
Weeks to a couple of months, and vitamins degrade faster in heat and light. Buy what your flock gets through in that window: at roughly a third of a pound per bird per day, six birds finish a 20 lb bag in about ten days and a 50 lb sack in around a month.
+What size feed container do I need?
One that swallows a whole sack, so you are not left with a half-empty bag defeating the purpose. Gamma2 publishes 21 by 12 by 17 inches for its 40 lb Outback, which takes a full sack. Most keepers also want a second, smaller container for scratch, grit and oyster shell.
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.
