They swim, share, and even form a group. When Zara Rottweiler’s little sister was born, she was overjoyed.

“He just knew that Gia was the new member of the group and he just knew how to protect her,” their mother Stacey told The Dodo. “They naturally grew up as siblings.”

He even shared some of his favorite toys with his beloved dog. “Every time Gia starts singing, she’s not really singing, Zara just starts howling,” Stacey explained. “He can’t help himself.”

Gia will launch her rant into the microphone, immediately followed by Zara’s howls. Sometimes Gia gets a little nervous that Zara is copying her.