Hatched 4 African goslings last week in April. They have been very healthy and growing well. Due to heat up to 90 today I let them in the kiddy pool in the morning. They are in a shaded pen . Had an appointment ,so put them back in the pen. By late afternoon my biggest one was dead , no obvious cause. Can this normally happen in raising geese ? Spontaneous death for no apparent reason ? Heat ? Should I set up a fan ? Very upset. Do not want it to happen again.