YOU SAID:

my dad ate my dog and my dog ate my cat and my cat was very mad so he ate a mouse

INTO JAPANESE

私のお父さんは私の犬を食べ、私の犬は私の猫を食べました、そして私の猫はとても怒っていたので彼はネズミを食べました

BACK INTO ENGLISH

My dad ate my dog, my dog ate my cat, and my cat was so angry that he ate a mouse

INTO JAPANESE

父は私の犬を食べました、私の犬は私の猫を食べました、そして私の猫は彼がネズミを食べたほど怒っていました

BACK INTO ENGLISH

My dad ate my dog, my dog ate my cat, and my cat was so angry that he ate a mouse