I have a question and the brooder temp. I have 5 ducklings they will be 3 weeks tomorrow and 85 F is too hot for them so I try to keep it at 80 but I haven't been able to. I can get it to 75 but is that going to be too cold for 3 week old ducklings? I have 3 mallards and 2 khaki Campbells. here is a picture of them huddled in a corner when temp was 85 F this is the corner furthest away from the light.