Spring grass arrives rich, fast-growing, and full of sugars after a winter of hay, and a horse's gut is populated by microbes tuned to whatever it has been eating for the past weeks. Turn a horse straight out onto lush pasture full-time and those microbes are overwhelmed: gas, loose droppings, and discomfort follow, and the upset can be marked in a sensitive animal. The gradual introduction is a feeding change managed like any other — the new feed is mixed into the old routine in growing proportions until the gut has caught up. Patience across one to two weeks is the whole method.
The Build-Up, Stage by Stage
Start with grazing in short spells, an hour or so at a time once a day, and keep the rest of the day on the familiar pattern of stable or paddock with hay. Every few days, lengthen the grazing by one step — a longer morning session, then grazing split across two sessions — so the increase is a staircase rather than a jump. Across one to two weeks the steps add up to full turnout for horses that are coping well. Horses that show loose droppings stay at their current stage until droppings firm up; a step back is part of the plan, not a failure of it. Keep the hay ration steady while grass time grows, and reduce it only as grazing becomes a real share of the day's forage, so total intake stays even and no horse stands hungry in the stable filling up later at the gate.
Hay First, Every Time
The single habit that carries this build-up is feeding hay before turnout, at every stage, without exception. A horse turned out hungry gorges: it eats fast, takes in a large load of rich grass quickly, and gives the gut a harder version of the change than it is ready for. A horse that has filled up on hay walks out and grazes at a working pace, mixing grass with the hay already in the stomach. So the order of the morning is fixed — hay in the stable or paddock first, time to eat it properly, then out to grass for that day's allotted period, then back in to the familiar routine. Water stays available in the stable, the paddock, and the field throughout, since intake rises as fresh grass replaces dry forage.
Adjust the staircase to the individual horse as well as to the calendar. A horse that has been living out on sparse winter grazing has a gut already working on grass, though far less rich grass, and usually steps up more easily than a horse that has been stabled on hay alone, which starts the full one-to-two-week climb from the first step. Horses prone to digestive upset take the smaller steps regardless of how well companions are coping, and any horse that comes in from a break — a week stabled with an injury, say — rejoins the staircase a step or two lower, because the gut drifts back toward the hay ration in the meantime.
Watching Digestion, and Sharing the Work
During the build-up, droppings are the daily report: note whether they are formed or loose, and watch each horse for discomfort — restlessness, reduced appetite, or a horse that stops grazing and stands apart. Mild looseness early on usually settles as the gut adjusts; looseness that worsens, or discomfort that is marked or repeated, means stepping back a stage and involving the vet for advice. These feeding duties are assigned through KinsLe's Care Teams, so the person feeding hay, the person turning out, and the person bringing in are all working to the same stage of the same plan, and the droppings check is a named task rather than something everyone assumes someone else did. Recorded as a shared sequence, the Care Teams plan on KinsLe lets whoever feeds that evening see exactly which stage the horses have reached.