on a pack of 12 wolves in Tama Zoological Park. Their observations involved the time when a wolf yawned. They observed the wolf involved, the other wolves that were in a close range of a few feet from the wolf that yawned, and the direction that the other wolves were looking when one of them yawned. They notified that 2 animals that held a strong social bond were more likely to yawn. They also noticed that with females, the stronger the bond, the shorter amount of time it takes for a yawn to be followed up with a yawn from another
