According to a study published in the Journal of the International Society of Anthrozoology, girls who sleep with their dogs in bed tend to have a better quality of sleep compared to those who sleep with cats or humans. The research involved surveying almost 1,000 women in the US about their relationships with their pets and how it affected their sleep.

Results showed that dog owners tend to wake up and go to bed earlier than those without dogs, while cats were found to be similar to human partners and offered less comfort and security compared to dogs. Overall, sleeping with a dog was associated with stronger feelings of comfort and security.