# A backyard flock and barn glossary > Twelve plain-language terms for small flocks and herds, from brooder to withdrawal period, with the extension sources behind them. Canonical: https://flockandbarn.com/flock-barn-glossary/ --- [Skip to content](https://flockandbarn.com/flock-barn-glossary.md#main) [Field guide](https://flockandbarn.com/) / Reference Source-based editorial reference · Not veterinarian reviewed Care guides are easier to use when the words are settled first. These definitions follow university extension usage; they are starting points for reading and record-keeping, not instructions for your animals. ## Poultry basics - **Brooder.** The warmed, draft-free space chicks need for their first weeks, with heat they can move toward or away from. University of Minnesota Extension's small-flock guidance starts chick care here. - **Clutch.** The group of eggs a hen lays before she settles in to sit, or the eggs you collect over several days as one group. - **Dust bath.** Dry soil or sand birds work through their feathers. It is normal maintenance, so give them a dry spot for it rather than stopping it. - **Molt.** The annual feather shed and regrowth. Hens commonly pause laying while they molt, and it is not on its own a sign of illness. - **Deep litter.** A bedding method where clean bedding is added over the old layer and the pack composts in place. It works only if it stays dry; wet, caked litter is a redo, not a top-up. ## Health and biosecurity - **Biosecurity.** The everyday habits that keep disease off the property: keeping new birds apart first, dedicated footwear or cleaned boots, and not sharing dirty equipment between flocks. - **Quarantine.** Keeping new or returning birds separate, watching them before they join the flock. eXtension's small-flock biosecurity guidance treats this separation as the core step. - **Withdrawal period.** The required wait after a medication before eggs or meat from that animal can be used. It comes from your veterinarian's directions and the product label, not from a chart online. - **Body condition score.** A hands-on check of fat and muscle cover. Michigan State University's goat scale runs 1 to 5, and the value is the trend: a slow slide over weeks is easy to miss without a number written down. ## Records and caretaking - **Observation log.** Dated notes on feed, water, eggs, behavior and anything unusual. Patterns show up in a week of notes that no single morning reveals. - **Handoff.** The notes a sitter needs before you leave: amounts, schedule, quirks, and your veterinarian's number. Written down, not remembered. - **Dry lot.** A sacrificed outdoor area that takes the wear so pasture can rest, especially in wet or dormant seasons. ## Common questions ### Why quarantine new birds before mixing them in? New or returning birds can carry illness without looking sick. Keeping them apart first is the core biosecurity step extension services recommend for small flocks. ## Sources for this reference [Small-scale poultry](https://extension.umn.edu/poultry/small-scale-poultry)University of Minnesota Extension · Accessed October 21, 2026 [Biosecurity for small poultry flocks](https://poultry.extension.org/articles/poultry-health/biosecurity-for-small-poultry-flocks/)eXtension, Small and backyard poultry · Accessed October 21, 2026 [Body condition scoring in goats](https://www.canr.msu.edu/news/body_condition_scoring_in_goats)Michigan State University Extension · Accessed October 21, 2026 Sources inform the definitions; their publishers do not endorse this website or PawLine. ## Keep reading [### A barn-entry routine visitors can follow One routine at the door: clean footwear, no animal contact on arrival, and a plan for anyone who has been near other flocks. Read the guide ↗](https://flockandbarn.com/biosecurity-entry/)[### A daily animal observation log Record the animal, date, what changed and what happened next. Write observations rather than a guessed diagnosis. Read the guide ↗](https://flockandbarn.com/barn-observation-log/)[### When a checklist should become a vet call For distress or a serious change, contact a veterinarian. Do not wait for a checklist, website or AI response to decide an urgent next step. Read the guide ↗](https://flockandbarn.com/when-to-call-vet/) [← All field guides](https://flockandbarn.com/)