YOU SAID:

I feel like my cat is sad

INTO JAPANESE

私の猫は悲しいような気

BACK INTO ENGLISH

My cat is so sad.

INTO JAPANESE

私の猫はとても悲しいです。

BACK INTO ENGLISH

My cat is very sad.

INTO JAPANESE

私の猫は非常に悲しいです。

BACK INTO ENGLISH

My cat is very sad.