"Even when this is done the title to the flock does not pass until they have been counted, but, nevertheless, the purchaser can hold the seller to the bargain if he does not make delivery, even though the purchase money has not passed, and by a like right the seller can hold the buyer if he does not pay up. "I will next speak about those other four subjects which Scrofa outlined, namely: the feeding, breeding, raising and physicking of sheep. In the first place, one should see that provision is made for feeding the flock throughout the entire year, as well indoors as out. The stable should be in a suitable location, protected against the wind, looking rather to the East than the South, on cleared and sloping ground so that it can be easily swept out and kept clean, for moisture not only rots the wool of the sheep but their hoofs as well and causes scab. When sheep have stood for several days you should strew the stable with new bedding, so that they may be more comfortable and be kept cleaner, and thus eat with more appetite. You should also contrive stalls separated from the others in which you may segregate the ewes about to yean, as well as any which may be ailing. This precaution is practicable, however, only with sheep fed at the steading, but those who graze their sheep in the mountain pastures and far from cover, carry with them wicker hurdles or nets, and other such conveniences with which they contrive folds for such separation. Sheep indeed are grazed far and wide so that often it happens that their winter quarters are many miles from their summer pastures." "I know that to be true," said I, "for my flocks winter in Apulia and spend the summer in the mountains above Reate: thus the public cattle drifts between these two localities balance the separated pastures, as a yoke balances two baskets."[120] Atticus resumed: "When sheep are fed continually in the same locality distinction must be made in the times of feeding them according to the seasons: thus in summer they are driven out[121] to pasture at day break because then the dewy grass is more appetizing than at midday, when it is dry. At sunrise they are driven to water, to make them more lickerish on their return. About noon and during the heat of the day they are permitted to lie in the shade of rocks or under broad spreading trees until the fresher evening air invites them to feed again until sunset.[122] A sheep should always graze with the sun behind it, because its head is very sensitive to heat. At sunset the flock should be given a short rest and then driven again to water, and so brought back to feed again until it is dark, for at that time of day the grass has renewed its pleasant savour. This routine is usually followed from the rising of the Pleiades until the autumn equinox.