9 CFR § 145.71 - Definitions.
---
identifier: "/us/cfr/t9/s145.71"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "9 CFR § 145.71 - Definitions."
title_number: 9
title_name: "Animals and Animal Products"
section_number: "145.71"
section_name: "Definitions."
chapter_name: "ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE"
subchapter_number: "G"
subchapter_name: "LIVESTOCK IMPROVEMENT"
part_number: "145"
part_name: "NATIONAL POULTRY IMPROVEMENT PLAN FOR BREEDING POULTRY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 8301-8317; 7 CFR 2.22, 2.80, and 371.4."
regulatory_source: "36 FR 23112, Dec. 3, 1971, unless otherwise noted. Redesignated at 44 FR 61586, Oct. 26, 1979."
cfr_part: "145"
---
# 145.71 Definitions.
Except where the context otherwise requires, for the purposes of this subpart the following terms shall be construed, respectively, to mean:
*Chicks.* Newly hatched chickens.
*Primary egg-type chicken breeding flocks.* Foundation flocks that are composed of pedigree, great-grandparent, and grandparent stock that has been developed for egg production and are maintained for the principal purpose of producing multiplier breeding chicks used to produce table egg layers.
*Started chickens.* Young chickens (chicks, pullets, cockerels, capons) which have been fed and watered and are less than 6 months of age.