Found two fleas on Vix dog. My old doggie only very rarely picked up fleas and things have probably moved on, so what is the least toxic option? The dds pet her all the time, as do i, and I don't want her covered in poisonous stuff , but clearly she needs de-fleaing. Will pop in to the vet tomorrow as they are closed today, but any advice on the best product? Medium breed, 15 months old.