Pigeon Book

[The engineer]

Could anyone recommend a good pigeon book. I am trying to develop a system for what to put in water etc. Some people put onion and garlicin. Some use salt and cider vinegar in the bath water. Using vitamins etc. Starting to find the whole thing slighlty confussing at the moment. I don't want to start wasting money giving potions just for the sake of it however if things like garlic cider etc are beneficial then i want to use them correctly.

Thanks