Should you get a child's cavities filled if they are in baby teeth and not causing any pain?

Yes: Cavities are caused by bacteria in the mouth, they will continue to grow and if severe infect the other teeth.

Yes : Pain does not indicate the severity of a cavity.

Absolutely !: Do you want to wait just to see if it starts hurting before they lose it.? Do you want it to be a front tooth that all his peers will see and make fun of his appearance? Do you want to watch the decay eat out the side of the tooth so the adjacent teeth come together and then crowd out the permanent one and you can pay the orthodontist more to move into the proper position?

Generally yes: Depends on the age. If the tooth in question is nearing the end of its tenure in the mouth, a small cavity may not be worth being filled. This is all generality, and a dentist will make an informed decision as to either leaving it to exfoliate (come out on its own), remove it, or to restore it. Each patient is different, and stage of development is important in determining which way to proceed.

Definitely!: Baby teeth are very important for proper nutrition, speech development, jaw development, and self esteem. The back baby teeth need to last till between about 8 1/2-12 years of age. Left untreated cavities will get larger and lead to unnecessary pain, infection and early tooth loss, turning the child into a dental cripple. Not treating cavities in baby teeth is tantamount to child neglect.