Two days ago I moved my six silkie and showgirls outside. It's been crazy hot, but the last few days had been high 80's instead of 90's, so I thought they'd be ok. They are around 2 months or so. Fully feathered. They had a shelter from the sun and cool water. I found one dead the next morning. I talked to the breeder for advice and then shaded the whole pen. I put ice in the waterers too. I even added a second waterer. Today another was dead. I brought them back inside. I plan on putting a solar attic ventilator in their new coop (they were in a temporary one) and covering the whole run. Anything else I can do to keep them from overheating?