That phrase means "Do you have a domestic animal (or pet)?"
So you would either say:
"Si, tengo un animal doméstico."
or
"No, no tengo un animal doméstico."
The phrase "animal doméstico" can also be replaced by the word "Mascota," which is the Spanish word for 'pet'.
A domestic animal.
No tienes un animal.
do you have an animal? if its a question. you have an animal. if its a statment.
tienes un animal domesticado
Tienes un hermano in English means have a brother.
Tienes tu un gato? = What is a cat?
¿Tienes un niño? (Familiar) ¿Usted tiene un niño? (Formal) ¿Tienes un hijo? (Do you have a son - Familiar) ¿Usted tiene un hijo? (Do you have a son - Formal) ¿Tienes in chico? (Do you have a little one [boy])
do you have a world?
tienes un amigo = you have a friend ¿Tienes tú amigo?= Do you have a friend?
do you have a world?
No tienes un perro.
tienes un coche