Santa's "rain" deer

Joshua picked the kids up from daycare last week. After they left and pulled out onto the road, Joshua saw a deer crossing up ahead, then another, and another. By this time, he has come to a complete stop in the road as about 10 deer cross the road right in front of them. The whole time Cooper is going nuts in the back seat, "daddy another deer, see all of them......." Finally all the deer are gone and they are able to head home. About a mile up the road Cooper starts explaining what kind of deer those were to daddy. "Hey daddy, those were just regular deer. Those weren't Santa's reign deer. Those kind of deer don't like the rain, they were just regular deer. Right daddy?"