* To stimulate breathing and circulation: A mother dog will lick her pups to encourage them to breathe and to help get their blood circulating properly. This is especially important in the first few hours after birth.
* To clean and keep the pups warm: A mother dog's licking helps to clean the pups of amniotic fluid and other birth materials. It also helps to keep them warm and dry, which is crucial for their survival, especially in the case of tiny chihuahua pups.
* To bond with her pups: Licking and grooming are a vital part of bonding between a mother dog and her pups. This behavior helps the mother to recognize her pups and form a strong maternal bond with them.
* To check for health: A mother dog will often lick and sniff her pups to check for any signs of illness or injury.
In short, the mother chihuahua is not just feeling her pup, she's actively caring for it in crucial ways.