If you are implying that tested and approved "pesticide products" will harm your pets you are sadly misinformed. They will potentially harm bees. DE will have absolutely no effect on internal parasites. It may lower the number of adult pests but it will not stop their eggs from hatching out.
I disagree. Many products on the market for pet use can harm pets and people. Two of the most commonly used products Frontline (Fipronil) and Advantage are (Imidacloprid) toxic to mammalian nervous systems. The dosage used for most animals shows little or no short term effects, however there are thousands of documented cases to the contrary. For a quick guide to flea products and what is in them, and possible side effects see
http://www.simplesteps.org/greenpaws-products#/h/+/+/623
I will clarify that I have used Diatomaceous Earth (DE) for ant control around elevated hives. There is no harm to the bees unless they walk in it. Then it will affect them like any other insect with a drying action and abrasion of their joints.
I agree that DE does not stop eggs from hatching, but does act to kill fleas, ****roaches, bedbugs and other insects by the abrasive action leading to dehydration. It is not a toxin and there is no tolerance or immunity build up in the affected insects as there can be with chemicals.
I tend to disagree with you about the internal parasite issue. There are many websites and bloggers who are advertising Food Grade DE for this purpose and testimonials of those who have used it, feeding DE to their pets and to themselves just search "DE internal parasites".
For the purpose of this forum and specifically how to treat a dog, home, and peacock for fleas without harming bees, DE is one non neurotoxin answer. In a yard I would have no problem putting Food Grade in dog bedding, play areas, or grass that is not likely to be walked on by bees. I am not totally against chemicals and most of the formulations used by pest control companies now break down in just a few days. If the hives cannot be moved and chemical use is the alternative of choice then perhaps they can be closed up and covered during the pesticide application, and left closed for a few days for the pesticides to break down. Another interesting article on natural flea control, but taking bees into account can be found at
http://www.motherearthnews.com/home...-flea-control-zmaz85mjzraw.aspx#axzz2xm29E0Vw
I am not looking to debate natural vs chemical, or other uses for DE Those topics may be for another venue. I just want to help another beek with the flea problem.