I think my birds are smarter than yours---they KNOW where the food is, even if I move it! Maybe they're just hungrier...
Anyway, re: the question--ALL animals need extra water in the summer, so a lot of us put extra water outside in the summer, and keep some inside, as well. A lot of placement is trial and error. Watch that all of your birds get enough food. Usually, in a flock or a herd the dominant animals take the lion's share and often run off the weaker members after they are full. Sometimes extra feeders get everybody fed, sometimes you need to segregate them in order for all of them to eat. I have been feeding chick grower to all of my 10 chicks (4 months old, now) AND, I've been sprinkling a pound of cracked corn, every day or so, to let them eat scratch. Everybody's fat and sassy---but my 3 roos are slated for our dinner next weekend.
Wild birds will only eat the chicks food IF they have access. With a wire roof, most animals, including cats, hawks and owls, won't enter even through a hole because they'll feel trapped trying to exit.
Going to get more Japanese beetles lures today. I want to lure them in for my birds, even if I invite my neighbors beetles and quadruple the population.