| Layer - Chickens grown to produce eggs for food, for example, table eggs | |
| Classes | Approximate Age |
| Starting/growing | From day hatched to 10 weeks |
| Finisher | From 10 weeks to the time the first egg is produced (20 weeks) |
| Laying | From the time the first egg is laid to the end of the chicken's egg production |
| Breeder (chickens that produce fertile eggs for hatch replacement layers that lay eggs for food such as table eggs) | From the time the first egg is laid to the end of the chicken's productive cycle |
| Broiler - Chickens grown for human food | |
| Classes | Approximate Age |
| Starting/growing | From day hatched to 5 weeks |
| Finisher | From 5 weeks to market, 42 to 52 days |
| Breeders - Hybrid strains of chickens, any age and either sex, whose offspring are grown for human food (broilers) | Any age |
| Broiler-Breeder - Chickens whose offspring are grown for human food | |
| Classes | Approximate Age |
| Starting/growing | From day hatched to 10 weeks |
| Finishing | From 10 weeks to the time the first egg is produced (20 weeks) |
| Laying (fertile egg producing chickens-broilers/roasters) | From day of first egg to the end of fertile egg production |
| Turkey | ||
| Classes | Purpose | Approximate Age |
| Starting/growing | Turkeys grown for human food | Females - From day hatched to 13 weeks |
| Males - From day hatched to 16 weeks | ||
| Finisher | Turkeys grown for human food | Females - From 13 weeks to 17 weeks |
| Males - From 16 weeks to 20 weeks or the desired market weight | ||
| Laying | Female turkeys producing eggs | From the time the first egg is produced to the end of egg production |
| Breeder | Turkeys grown to produce fertile eggs (both sexes) | From day hatched to time first egg is produced (30 weeks) |