?????? little chicks????

Does the shed heat up much during really warm weather as you could have major problems not just for the chicks but for your hens as well, as the heat lamp will only add to the ambient temperature of the shed. My wooden coop, which is 8'x16' and 7' high registered a midday temperature of over 38C in the last really hot spell we had and that was with the vents and pop hole open. I opened the door in the end and covered it with mesh just to get some air through. If you add that type of temperature to that of your heat lamp, your chicks will dehydrate very quickly. I usually keep the chicks in a shady part of my kitchen or bathroom so I can better moderate the temperature.

Stick a thermometer in your coop and check the temperature several times a day over the next few days - especially if the weather is hot - and get an average temperature reading for various times of the day.