Every chicken keeper with a big yard has heard it, and half of them say it: my free-range hens barely touch the feeder, so I hardly buy feed. It sounds right. The birds are out there all day eating bugs and grass. Why would they need the bag? The honest answer comes from poultry nutrition research, and it is less generous than the yard wisdom: do free-range chickens eat less feed? Barely. Sometimes they eat more.
Do free-range chickens eat less feed? The research answer
Here is the part the yard wisdom skips. A hen that walks around all day burns more energy than a hen that sits in a run. AgriInsight's feeding guide for cage-free layers puts the number at 10 to 20% more energy needed for movement, dust bathing, and thermoregulation. FeedStrategy's nutrition review says the same thing from the other side: cage-free layers have greater energy requirements, and hens compensate by eating more to reach the energy level they need. The pasture gives with one hand and the exercise takes with the other.
The measured results back this up. In a study summarized by Canadian Poultry Magazine comparing caged hens with hens on range paddocks, daily feed consumption came out at 103 grams for the caged birds versus 101 grams for the range birds.
Two grams. The researchers concluded the range hens showed little reliance on pasture for their nutritional requirements. Egg income minus feed costs was actually lower for the range treatment, $18.07 per hen versus $23.70, because production dipped while feed costs barely moved. FarmProgress's summary of the big Coalition for Sustainable Egg Supply study lands in the same place: feed costs for cage-free hens run slightly higher than for hens in conventional cages.
None of this means foraging is worthless. Bugs and greens do displace some purchased feed, and the displacement is real on good pasture in summer. But it is modest, roughly 10 to 20% of intake in the best season, and it vanishes in winter when the ground offers nothing and the birds burn extra energy staying warm. Feed intake for layers can swing 30 to 40 grams per bird per day between summer and winter, per the FeedStrategy review. Anyone who measured their summer savings and projected them across the year has done the keeper's version of extrapolating a bull market.
The honest math: 12 hens, one 50-pound bag
Let us run the honest numbers for 12 hens. A laying hen eats about 115 grams a day, roughly 4 ounces. Twelve hens go through about 1.38 kilograms a day, just over 3 pounds. A 50 pound bag lasts about 16 days with confined birds. Give them excellent summer pasture and purchased feed drops maybe 15%: the bag stretches to about 19 days. At $22 a bag, monthly feed runs about $41 confined versus about $35 free-ranging in the good months. Six dollars a month in summer, nothing in winter. That is the real savings, and it is not nothing, but it will not pay for the fencing.
The one mistake the yard wisdom causes
The dangerous version of the yard wisdom is the one where keepers act on it. Cutting back the feeder to force birds onto pasture does not make them forage harder; it makes them undernourished. Forage is not a balanced ration. It is low in the calcium and consistent protein that laying requires, and a hen short on calcium does not lay thinner shells politely, she pulls it from her own bones. Keep the layer feed available free choice, always, and let the pasture be a supplement rather than a plan.
If you want your own number instead of mine, weigh it. Mark the feed bin, weigh what goes into the feeder over exactly seven days, and divide by birds and days. Do it once in July and once in January. Most keepers who do this find the summer dip is smaller than they felt it was, which is exactly why the calculator on this site uses the 115-gram baseline and lets you adjust it. Your birds, your pasture, your number, but get it from the scale rather than the feeling.
Which raises the fair question: why free-range at all, if the feed math is this thin? Because the reasons were never really about the feed bill. The birds are healthier and calmer with room to move, they handle pests in the garden, and their manure goes where it is useful instead of where you have to shovel it. Plenty of keepers also believe the eggs taste better, and the Canadian study did find higher omega-3 levels in range eggs. Those are real benefits. A feed discount was never one of them, and the sooner you stop budgeting for it, the sooner the actual benefits get to be the point.
My rule of thumb: budget feed as if the birds were confined, and treat any summer reduction as a bonus. The bag math does not lie, and neither do the studies. Free-range your hens for everything the range actually gives them, and buy the feed anyway.
Frequently asked questions
How much less feed do free-range chickens eat?
On good summer pasture, roughly 10 to 20% less purchased feed, and nothing in winter. One study measured 103 grams per day for caged hens versus 101 grams for range hens, nearly identical, because ranging birds burn 10 to 20% more energy on movement and thermoregulation.
Can chickens live on foraging alone?
No. Forage is not a balanced ration: it is low in the calcium and consistent protein that laying requires, and a calcium-short hen pulls the mineral from her own bones. Keep layer feed available free choice at all times and treat pasture as a supplement.
Does free-ranging lower the cost of keeping chickens?
Barely on feed. For 12 hens the honest math is about $6 a month saved in the good pasture months, nothing in winter. The real benefits of ranging are bird welfare, garden pest control, useful manure placement, and egg quality: one study found higher omega-3 levels in range eggs.
Should I feed less in summer when pasture is good?
Do not cut the feeder to force foraging; it undernourishes the birds rather than making them forage harder. Let them self-regulate, and if you want your own number, weigh a full week of feeder usage in July and again in January.
Do free-range eggs cost less to produce?
Not from feed savings. One comparative study found egg income minus feed costs was lower for range hens, $18.07 versus $23.70 per hen, because production dipped while feed consumption barely moved. Any price premium for free-range eggs comes from the market, not from lower costs.
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