noun
dogs and cats; pets
Literally 'dogs and cats'; often used to refer to household pets in general.
このアパートでは犬猫を飼ってはいけません。
You cannot keep dogs or cats in this apartment.
彼女は犬猫が大好きで、家に三匹もいる。
She loves dogs and cats and has three at home.
noun
trivial thing; worthless thing
Idiomatic use: something as insignificant as a stray dog or cat; often in negative contexts implying something is treated as worthless or beneath notice.
彼は私の意見を犬猫のように扱った。
He treated my opinion as if it were worthless.
Compound of 犬 (dog) and 猫 (cat). The idiomatic sense likely derives from the idea that stray dogs and cats are considered of little value.