Vets Face Rising Worry Over Fleas.

The article discusses concerns regarding the potential increase of instances of pets in the U.S. getting fleas, highlighting veterinarians' (vets) responses to the concerns. Topics addressed include vets' claims that there is no evidence to suggest that pet owners should be concerned about the effectiveness of flea products containing the chemical fipronil, as well as potential causes of flea population booms and resistance to products.