I too would always be careful whom I let feed my poultry, both because of liability issues and for the sake of my birds themselves. A rooster could conceivably attack a stranger, which would be especially intimidating to a small child not much bigger than a large rooster. And even a well-intentioned person could give the birds something they ought not to have. If I got a neighbor, friend, etc. to look after my birds I'd make sure they knew what to do and what not to do.