to produce more babies or young animals than a particular environment can support

There are plenty of resources for everyone if we don't overbreed. 如果我们不过度生育，每个人都会享有充足的资源。

Coyotes will not overbreed a given area. 土狼不会在某个区域过度繁殖。

to breed animals from particular parents so that they have certain features, in a way that may not be healthy

Many fashionable dog breeds have been overbred and have genetic problems. 许多时髦的狗品种出现了过度配种的情况，而且有遗传方面的问题。