Mice are prolific breeders.

鼠类繁殖力很强。

Most breeders now will not sell unweaned mynahs, so usually you cannot get one younger than 6 or 7 weeks old now, but that is still plenty young enough to begin training your mynah.

许多饲养者不买的鹩哥宝宝，那你一般就无法得到于6到7周大的雏鸟，但训练鹩哥这个经够大了。