YOU SAID:

my dog got 4 very long legs with nasty nails on it.

INTO JAPANESE

私の犬は4本の非常に長い脚をもち、爪がひどいです。

BACK INTO ENGLISH

My dog has four very long legs and has terrible claws.

INTO JAPANESE

私の犬は4本の非常に長い脚を持ち、ひどい爪をしています。

BACK INTO ENGLISH

My dog has four very long legs and has terrible claws.