I refer to year old sacrificial sheep as lambs because Christ is called the Paschal Lamb.
And because Scripture (Exodus and Numbers) refers to these sacrificial sheep as lambs.
One year old woolen coated sheep cited for slaughter at Passover would have no problem handled 30 to 50 degree weather in December without being penned inside.
Lambs in Iceland are born in March / April and are slaughtered in September. At 5-6 months old, a single lamb can weigh around 18 kg (39.6 lb), after the skin and wool, head and innards and hooves have been removed. A single kg of meat can feed 3-4 people for a normal meal. People usually eat more at festival meals, so let's say that each person ate 0.5 kg (weight including bones). That means that a single lamb that age would be enough for 36 people. There are not many families that big, yet each family was to offer a lamb and finish eating it before morning. How did they do that? Simple. The lambs weren't a year old, but "in the first year", which means less than a year old. They were, in fact, only a month or so old. Maybe less.
But now we're getting into another time of year all together. We were talking about Christmas. However old the lambs were that were eaten at Passover, the fact is that the sheep were not kept out in the fields at night in December.
The TOG