YOU SAID:

I took him to the grocery store and we ate a chihuahua

INTO JAPANESE

私は彼を食料品店に連れて行き、チワワを食べました

BACK INTO ENGLISH

I took him to the grocery store and fed him a chihuahua

INTO JAPANESE

私は彼を食料品店に連れて行き、チワワに餌をやった

BACK INTO ENGLISH

I took him to the grocery store and fed him a chihuahua