The short answer for a Muscovy duckling
A young Muscovy duck typically stays with its mother for eight to twelve weeks before it is ready to be rehomed. That is roughly double the nursery period of the common mallard-derived breeds, and it reflects both sides of the pairing: the Muscovy mother is one of the most committed mothers in domestic poultry, and her ducklings are growing into large, heavy birds whose full waterproof feathering takes its time arriving. Rehoming before the feathers and the independence are genuinely in place trades a few saved weeks for a chilled, stressed youngster at the other end.
A different kind of duck, a different timetable
A Muscovy is not a mallard descendant at all — it is a separate South American species with its own biology, and its nesting habits show it. Muscovy ducklings, meanwhile, are not in a hurry either: they grow steadily into a big frame, and their juvenile feathers come in over a longer arc, with the last downy patches around the head and underbody lingering while their mallard-derived cousins are already sleek. Trying to hold a Muscovy family to a Pekin schedule is the root of most rehoming trouble with this species.
Signs the long nursery is ending
A young Muscovy is nearing readiness when its feathering is complete enough that rain and swimming leave it dry and unconcerned, able to preen and settle without seeking the mother's underside to warm up. The mother herself softens her vigilance — she stops charging at every approaching cat or crow, lets the youngsters drift to the far end of the pen, and may begin showing interest in nesting again. When the family's daytime life looks like a flock rather than a nursery, the separation the calendar suggests is also the one the birds have already half-made themselves.
Separating from a protective Muscovy mother
Rehoming a young Muscovy requires a little respect for the mother's opinion, because a Muscovy hen will defend her brood physically and can be genuinely formidable about it. Work at dusk, when the family is settled and drowsy, and lift the youngsters out calmly rather than staging a midday roundup that leaves the whole pen in uproar. Move the young birds in their sibling group — Muscovies are social and a lone duckling pines noisily — and have their new pen ready with shallow water they can exit easily and shelter they can find without guidance.
Timing errors this species punishes
The expensive mistake with a young Muscovy is importing another breed's calendar: sending ducklings out at six weeks because that suited Pekins leaves big, slow-feathering youngsters chilling in damp weather and failing to thrive. Judging by size alone is nearly as bad — a Muscovy duckling looks enormous at eight weeks, which tempts keepers to call it finished while its underbody is still carrying down that soaks through in rain. Read feathers and behaviour, not the scale and not another species' chart.
Records for a bird with a long childhood
Because a young Muscovy spends so long with its mother, its early record holds more than most: hatch date, how it grew compared with its siblings, the feed it was raised on, any slow starts or pasty vents or minor injuries across those twelve weeks, and how it handled its first swims and feeds. A new keeper — and any veterinarian they consult in the settling-in period — inherits a bird whose history genuinely matters and cannot be recited from memory at the gate. A rehomed Muscovy that goes off its feed, sits apart gasping, or loses condition in its first week needs a veterinarian promptly, and that visit goes better with real notes in hand. Handing a young Muscovy's history over through KinsLe's Transferrable Profiles keeps those eight to twelve weeks of growth and care notes attached to the bird as it moves, so its new keeper starts from knowledge instead of guesswork.