I´m say "CRAZY DOG" in English. But in Spanish say "PERRO LOCO"

If you want to add an expression from Mexico (not sure if used in the whole country) you could say "El perro esta pirata" like a pirate. I think this comes from piracy, in the terms that some illegal products have low quality and they might not work as expected, like your dogs in this case :).

crazy dog ​​if it is a single dog. But they are two, it should be in Spanish. "PERROS LOCOS"

naughty dogs