Two layers: the daily look and the weekly catch-up
Ducks hide illness as a survival habit, so a routine that depends on noticing a sick duck from across the pen will always run late. Split the job in two. The daily layer takes two minutes while you feed and change water: watch the group arrive — a healthy flock comes noisily and together — and pick out the bird hanging back, the one sitting when the others are up, the one not plunging her head in the water. Eyes should be bright and clean, nostrils clear, and heads should be going under water freely, because ducks use bathing water to keep their eyes and nostrils healthy. The weekly layer is hands-on: catch each duck calmly in turn and actually check her, because the important findings — feet, vent, condition — are all underneath.
What the weekly hands-on check covers
Start with the feet, the duck's weak point. Turn the bird gently and look at the soles: a healthy foot is smooth and flat, while a swelling, a dark scab or a hot, puffy pad signals the foot infection ducks develop from standing on hard or dirty ground, and it needs attention early while it is still small. Run a hand over the breastbone to judge condition under the feathers — the bone should be feelable but padded — and part the feathers over the back and under the wings looking for lice, mites and broken skin. Check the vent is clean, the bill free of cracks or overgrowth, and watch her walk away when you set her down: a stiff, rocking or reluctant gait confirms what the feet suggested.
Spring and summer: laying, water and heat
In spring the routine tilts towards laying: laying ducks need condition checks more often, and the signs to know are the ones around egg-laying difficulty — a duck who is straining, penguin-postured, off her food and quiet needs prompt veterinary help, not a wait until morning. Broody ducks need checking under, because a bird sitting tight for weeks loses condition and can harbour parasites in the nest. Summer shifts the focus to water and heat: bathing water fouls fast in warm weather and dirty water drives eye and respiratory infections, so the daily water change becomes the health check that matters most, alongside shade at midday and watching for birds panting with bills open on still, hot afternoons.
Autumn and winter: moult, condition and ice
Autumn is for the moult and honest condition scoring — a duck going into winter thin will struggle, and the weekly catch-up is when you find her while supplementary feeding can still fix it. Winter's checks are about water and feet again, from the other direction: drinking and head-dipping water must be available unfrozen, because a duck who cannot dip her head cannot keep her eyes healthy; and feet on frozen, rutted ground pick up the cuts that become infections, so bedding depth and dry standing areas get checked as often as the birds.
When the routine hands over to the vet
The routine's job is to catch the moment observation becomes a case. A duck who stops bathing and sits apart, breathes audibly or with her bill open, goes off food for more than a day, becomes lame, or shows a swelling on the foot that is growing rather than shrinking, should be separated somewhere she can be watched with food and water in reach, and a vet — ideally one who sees birds — should be involved promptly if she is not clearly improving within a day, and immediately for breathing difficulty or a collapsed bird.
A routine written down is a routine that survives busy weeks, and records are what turn weekly checks into early warnings: a duck whose condition score has slipped three weeks running is a case, even though she looked fine each individual week. Keeping each duck's check notes, weights and any treatments in her KinsLe Pet Passport keeps that history in one packet, ready to hand to a vet who needs the back-story rather than today's snapshot.