Goslings need a waterfowl-specific starter feed with around 20% protein for their first two weeks, then a gradual transition to lower-protein feed as they grow. Getting this balance right matters more than you might expect. Too much protein can cause permanent wing deformities, while missing key nutrients like niacin can lead to crippling leg problems. Here’s how to feed goslings well from hatch through their first months of life.
Starter Feed for the First Two Weeks
From hatch through two weeks of age, goslings should eat a waterfowl starter crumble containing about 20% protein. Crumbles are easier for tiny bills to manage than pellets. If you can’t find waterfowl-specific feed, an unmedicated chick starter works as a temporary substitute, but it will need a niacin supplement (more on that below). Never use medicated chick feed. The medication levels are formulated for chickens and can be harmful to waterfowl, which eat more feed per body weight.
Keep feed available at all times during this stage. Goslings grow fast and eat frequently. Always place water next to the feed. Goslings need to dunk their heads and clear their nostrils while eating, so use a waterer deep enough for them to submerge their bills but shallow enough that they can’t climb in and get chilled.
Switching to Grower Feed
At two weeks, transition goslings to a grower formula with roughly 18% protein. This slight drop in protein is intentional. Goslings that stay on high-protein feed too long are at greater risk for a condition called angel wing, where the last joint of the wing twists outward permanently. Research has identified excessive protein intake, overfeeding, and deficiencies in calcium, manganese, and vitamin D as contributing factors. Reducing protein at the right time is one of the simplest ways to prevent it.
Stay on grower feed until goslings are about five to six weeks old, at which point they can begin shifting toward an adult maintenance diet supplemented heavily by grazing. By eight to ten weeks, most goslings raised with access to good pasture get the majority of their nutrition from grass and only need a smaller ration of pelleted feed.
Why Niacin Is Non-Negotiable
Niacin, or vitamin B3, is the single most important nutrient that goslings need and that standard chicken feed doesn’t provide enough of. Without adequate niacin, goslings develop bowed legs and a condition called perosis, where the tendons slip out of place at the joint. Once the damage is done, it’s often irreversible.
Research in poultry science has shown that adding 30 to 40 milligrams of niacin per kilogram of feed completely prevents these leg deformities in goslings. Waterfowl-specific feeds typically include enough niacin already. If you’re using chick starter, you’ll need to supplement. Brewer’s yeast is the most common solution: sprinkle about 1 tablespoon per cup of feed. It’s rich in niacin and easy for goslings to digest. You can also dissolve niacin tablets in their water, though brewer’s yeast is simpler and harder to overdose.
Introducing Grass and Forage
Geese are grazers at heart, and goslings can start nibbling on fresh grass as early as one week old. At this stage, finely chopped greens mixed into their feed tray work well. By two to three weeks, supervised trips onto short, pesticide-free grass let them practice natural foraging behavior.
Geese prefer tender, palatable grasses: bluegrass, orchard grass, timothy, bromegrass, and clovers are all favorites. They tend to avoid tougher plants like mature alfalfa. If you have a yard with any of these grasses, you already have a free food source. Just make sure the lawn hasn’t been treated with herbicides, pesticides, or chemical fertilizers. Goslings are small and more vulnerable to toxins than adult birds.
As goslings grow, grazing becomes an increasingly large part of their diet. Adult geese on good pasture can meet most of their nutritional needs from grass alone, which is unusual among domestic poultry. Building that grazing habit early pays off.
Vegetables, Fruits, and Treats
Fresh vegetables and fruits make excellent supplemental foods for goslings once they’re a week or two old. Chopped leafy greens like romaine lettuce, watercress, and dandelion leaves are ideal starting treats because they’re soft and nutritious. Peas (defrosted frozen peas work perfectly), chopped watermelon, sweet corn, and melon are also well-loved. Chop everything small enough that goslings can swallow it easily, and always serve treats in or near water so they can wash them down.
Treats should stay a small portion of the overall diet, roughly 10% or less. The bulk of nutrition needs to come from their formulated feed and, as they get older, from grazing. Overloading on treats can unbalance the protein and calorie ratios that matter during rapid growth.
Grit and Digestion
Once goslings start eating anything beyond commercial crumbles, including grass, greens, or treats, they need insoluble grit. Grit is simply small, hard particles (usually crushed granite) that sit in the gizzard and grind fibrous plant material. Without it, goslings can’t properly break down the greens they eat.
Use chick-sized grit for young goslings, then switch to a larger size as they grow. Offer it in a small dish free-choice rather than mixing it into feed. Goslings will take what they need. If your birds spend time on natural ground with sandy or gravelly soil, they may pick up enough grit on their own, but offering it separately is a reliable backup.
Foods and Plants to Avoid
Goslings are curious and will eat almost anything at bill level, which makes toxic plants a real danger. Oleander is one of the most lethal. A case study documented in veterinary literature found that geese died within 10 to 90 minutes of eating oleander leaves that had been accidentally mixed with grass clippings during pruning. Every part of the oleander plant, including leaves, stems, seeds, and roots, contains toxic compounds that cause fatal heart failure.
Other plants to keep away from goslings and adult geese include nightshade, foxglove, rhododendron, azalea, yew, and lily of the valley. If you’re unsure about a plant in your yard, remove it or fence goslings away from it.
On the food side, avoid giving goslings bread (it’s nutritionally empty and can cause the same metabolic problems as overfeeding), raw dried beans, avocado, onions, and anything moldy. Moldy feed or damp, spoiled grain can harbor fungi that produce toxins especially dangerous to young waterfowl.
Quick Feeding Timeline
- Hatch to 2 weeks: Waterfowl starter crumbles (20% protein), niacin supplement if using chick feed, fresh water always available.
- 2 to 5 weeks: Grower feed (18% protein), introduce chopped greens and supervised grazing, provide chick-sized grit.
- 5 to 10 weeks: Continue grower feed with increasing pasture time. Gradually reduce feed ration as grazing intake rises.
- 10 weeks onward: Transition to adult maintenance feed supplemented by free-range grazing. Fresh vegetables and fruits as treats.
Throughout every stage, clean water deep enough for bill-dipping is just as important as the feed itself. Goslings that can’t wash their food down properly are at risk of choking, and dirty water breeds bacteria that hit young birds hardest.