She 's had to be content to sniff when we return home . She seems to enjoy this very much , but I ' m sure it does n't make up for the heartbreak of being left behind . She 's also the alpha dog in the house , so this particularly does n't sit well with her . The younger dog has gotten MUCH better about running next to me .

Give answer the following question using evidence from the above passage: Which of the following is true of her ?
She is someone 's pet .