What should you do? Tell Sadie to stop sneezing! Labs are eager to please.

Sheldom will they sneeze as a result of a "cold", although it can occur a little in kennel cough. There can be localized irritations (dust, "nasal mites") resulting in localized bacterial infections. Allergies are low on the list of causes. Also there are esoteric causes such as foreign objects lodged in the nasal passages, tooth root problems , and other things too unpleasant to consider.

To the Vet you go...