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I dont know of any accepted groups nor clicks. Perhaps if you posted in the emergency section, you've wouldve gotten quicker responses.
I will answer your question and I can only give you recommendations for chickens and certain wormers for turkey's. I have no clue what to use on the other fowl you mentioned. I wouldnt recommend a wormer for ducks, geese nor guinea fowl because I dont know if the wormers for chickens would be effective or detrimental to those fowl you mentioned. Therefore I cant recommend a wormer for them. Besides, I dont own those types of fowl.
For chickens, I recommend valbazen. It is a liquid cattle/sheep wormer and is administered orally. You can use a syringe without a needle. Dosage is 1/2cc for standard size chickens and 1/4cc for smaller chickens. Redose again 10 days later to kill larva hatched from eggs since the initial dosing. Valbazen slowly kills worms over several dyas and there is no need to worry about toxic dead worm overload in their system. Valbazen kills all types of worms including tapeworms. There is a 24 day withdrawal period (as Roz mentioned) from start to finish.
Wazine only gets rid of large roundworms and is mixed in water. It used in chickens, turkey's and swine as mentioned.
The bad thing about adding wormers to water is the fact that you dont know if they actually drank the treated water or not AND/OR if they drank enough of it to be effective. Additionally if there are lethagic or sick chickens, they wont drink anyway... they are too sick to drink.
Besides wazine in turkey's, safeguard equine paste and/or safeguard 10% liquid goat wormer can both be used in chickens and turkey's. Administration is orally. For the paste, dosage is a "pea" size amount given to each chicken. For the safeguard liquid goat wormer, dosage is orally...1cc for giants, 3/4cc for large fowl, 1/2cc standards, 1/4cc for smaller chickens. Redose again 10 days later (both wormers.) There is a 24 day withdrawal period from start to finish with both wormers.
You can use zimectrin gold equine paste equine wormer which contains ivermectin and praziquantel. Praziquantel kills tapeworms. Dosage is orally, a small "pea" size amount to each chicken. Repeat dosing in 10 days. There is a 24 day withdrawal period start to finish.
You can use equimax paste equine wormer which contains ivermectin and praziquantel. Given orally. Same dosage and withdrawal as zimectrin gold.
You can use eprinex. It is placed on bare skin on the back of the chickens neck. Dosage is 1/2cc for standard size, 1/4cc for smaller chickens. There is no with drawal period for eprinex, Redose again 10 days later.
You can use ivermectin pour on. It is placed on bare skin on the back of the chickens neck. Dosage is 6 drops for giants, 5 drops for large fowl, 4 drops for standards, 3 for small chickens, 2 drops for smaller chickens, 1 drop for 4-16 week old chicks. Redose again 10 days later. There is a 24 day withdrawal period start to finish.
There are other equine paste wormers with BB size dosages, but I have never used them.
Wazine and safeguard are the only wormers that I know of that can be used on turkey's. (I dont own turkey's) The rest can be used on chickens. DE will not prevent nor kill worms. Valbazen is the best wormer on the market.
ETA: The best time to worm is whenever you decide to worm. I worm every 3 months. Worms weaken the chickens immune system opening the door for other diseases to infect them. I recommend that you set up a regular worming schedule that best suits your environmental conditions. Warm and wet soil calls for worming sooner. Cold and dry soil requires less worming.