“breeding sow”簡單造句，breeding sow造句子

The quality of management of breeding sows, the direct impact of its heat, ovulation, fertilization and birth, and even affect sow fertility and the use of follow-up period.

In 1999, it introduced a ban on the most egregiously horrible farming methods - narrow stalls for breeding sows that prevented them from turning around, and tethers that tied pigs to the spot.