Actually, there are quite a few threads, on the forums, about controlling fleas, if you use the forums search option, you'll find a raft of them.....
Here's something I recently posted to a similar thread, though I don't know about dog worming medications.....
Everyone on the forums do not agree about the safety of using some products, such as 5% Sevin dust, around companion birds, however, there have been various medical and veterinary types who have published information about its safety, but those of us charged with the care of our companion animals must make our own decisions, based on the information we have at our disposal:
"In one of her 2006 postings to her Exotic Pet Vet Net, Margaret Wissman, DVM, specifically says that 5% Sevin dust, along with several other products “are usually safe to use around birds” though she does say that you should also discuss its use with your veterinarian. Sarcocystosis
In Canada, Dominion Veterinary Laboratories has a posted paper for Canadian veterinarians, that discusses the Sevin dust product: Dusting Powder (Canada) for Animal Use - Drugs.com
To be fair, there are several activist sites around that would have you not use anything that is not a natural insecticide, but like anything today, we must, based on the information we have at hand, we must make our own informed decisions, that affect us, our families and the animals we have chosen to be responsible for.....
The current issue (1978 Univ. of Minnesota Press, Henry Joseph Griffiths) of A Handbook of Veterinary Parasitology: Domestic Animals of North America, states, in its discussion of control of mites in foul (chickens, turkeys, ducks, geese, etc.), specifically the red mite and northern feather mite that: “Control: Involves management of both the birds and their surroundings. Among older compounds, nicotine sulfate is recommended as a roost paint. A wettable powder spray of coumaphos may be used directly on the birds at the rate of of 1 gallon per 100 birds. Malathion dust or spray may be used on roosts, droppings, nests, and litter. Effective and safe control has been accomplished with Sevin dust.”
For those who follow/followed holisticbird.org and their newsletter, their article at HolisticBird and HolisticBirds discusses Sevin dust usage and their experienced success in using it.
Then, in a May 14, 2014, blog Canary Tales: Friends In The Fancy - Dr. Jim Sillers DVM - Air Sac Mites there is an article Air Sac Mites 101 by Dr. Jim Sillers DVM, who starts off the article with “I am not an avian veterinarian but I have owned,bred and treated birds my entire professional life.”then further recommends “If I saw air sac mites in my aviary today I would mix Sevin into a sprayer and spray the cages.”
The various links are posted for everyone’s edification (and to verify/qualify what I have posted, from the scientific/education community to breeders, to veterinarians), from the followers of holistic/alternative medicine to followers of accepted veterinary medicine.....enjoy your reading....."
Leelee, the 5% Sevin dust is available in the UK.....good luck.....