Watch the video below of Alicia kiss-feeding and see what you think of this practice.

Alicia Silverstone feeds her son already chewed up food.

The practice is called kiss-feeding and is basically where the parent chews up food and then spits it in the baby's mouth, like a mother bird would to her chick.

Is it a good idea?

“There are those who think that a mom chewing a baby’s food provides helpful enzymes from her mouth but it doesn’t seem like a hygienic practice. Various viruses and bacteria, but especially herpes virus, may be passed from mother to baby,” Dr. Jennifer Landa, M.D Chief Medical Officer of BodyLogicMD told FOX411’s Pop Tarts column.

“These microbes present a challenge that the infant’s immune system may not be ready for. So the practice is questionable for safety, and then, there’s a certain ick factor here that needs to be considered.”

Watch the video below and see what you think of this practice.

(Image: WENN)