Dog is 'perro' and bad is 'malo' so I guess 'perro malo' or maybe 'malo perro'. A computer translator gave me 'mún perro' but either I don't understand enough Spanish or that's not right.
perro malo
Mi perro.
perrito
There are two ways that you can say "too bad" in Spanish, lástima or ¡qué pena!
pobre perro
perro negro
perro
Perro.
To say My dog likes to eat dog food in Spanish, is:Mi perro gusta comer alimentos para perros.
Me falta un perro is the best way to say "I am missing a dog" in Spanish.
hembra
su perro
Mi perro.
perra
hembra
perrito
Mal
I'm bad = soy malo