a su dueño

its owner

→ a
phrase Rare #38,074
its owner Su can mean his, her, its, your (formal), or their, depending on context. The a is sometimes the personal a before a person as a direct object, so it is not translated into English.
SP: El gato se acercó a su dueño.
EN: The cat approached its owner.

La bicicleta que el hombre robó le fue devuelto a su dueño.

The bicycle that the man stole was returned to its owner.

Debo devolvérselo a su dueño.

I have to return it to its owner.

— 活着 (1994)

El perro miró ansiosamente a su dueño.

The dog looked anxiously at its owner.

Así de convencida estoy de haber encontrado a su dueño.

I am so convinced that I have found its owner.

— 霸王别姬 (1993)

¿Ve con cuánto amor sigue mirando a su dueño?

See how lovingly he still looks at his owner?

— Amélie (2001)

No parece que esto le fuese muy útil a su dueño.

It doesn't seem like this was very useful to its owner.

— Por un puñado de dólares (1964)

El perro seguía a su dueño moviendo la cola.

The dog followed its owner wagging its tail.