They ----(饲养)two dogs last year.

最好是 raised

They kept two dogs last years.

应该填 bred 为breed的过去式

fed raised reared 都可以啊 表达方式很多
都是饲养，喂养的意思

They bred two dogs last year. or they feeded two dogs last year.

kept
bred
fed都可以,并且肯定都对