YOU SAID:

i have a 100 dog i need to feed

INTO JAPANESE

私は100匹の犬を飼っているので餌をあげる必要があります

BACK INTO ENGLISH

I have 100 dogs so I need to feed them

INTO JAPANESE

犬を100匹飼っているので餌をあげなければなりません

BACK INTO ENGLISH

I have 100 dogs and I have to feed them.

INTO JAPANESE

私は犬を100匹飼っていて、彼らに餌をあげなければなりません。

BACK INTO ENGLISH

I have 100 dogs and I have to feed them.