YOU SAID:

Ponies are rather nice horses

INTO JAPANESE

ポニーはかなり良い馬です

BACK INTO ENGLISH

The pony is a pretty good horse.

INTO JAPANESE

その子馬はかなりいい馬だ。

BACK INTO ENGLISH

The little horse is quite a good horse.

INTO JAPANESE

その小さな馬はかなりいい馬だ。

BACK INTO ENGLISH

The little horse is a pretty good one.

INTO JAPANESE

その小さな馬はかなりいい馬だ。

BACK INTO ENGLISH

The little horse is a pretty good one.