Standard Hanafi age benchmarks:
Camel: at least 5 completed years.
Cattle/buffalo: at least 2 completed years.
Goat: at least 1 completed year.
Sheep: normally 1 year; a sufficiently well-developed jadha‘ of at least six completed months can qualify.
These numerical benchmarks are explanatory details from Hanafi commentaries, not numbers explicitly in the quoted sentence.