"For whoever buys cattle must consider the number of herds and how many in each herd he can feed on his land, lest his pastures prove short or more than he need, as so in either case the profit be lost. Further more, one should know how many breeding ewes there are in the flock, how many rams, how many lambs of each sex, how many culls to be weeded out. Thus, if a ewe has more lambs at a birth than she can nourish, you should do what some shepherds practise--take part of them away from her, which is done to the end that those remaining may prosper." "Beware!" put in Atticus, "that your generalisations do not lead you astray, and that your insistence on the rule of nine does not contradict your own definition of small and large cattle: for how can all your principles be applied to mules and to shepherds, since those with respect to breeding certainly cannot be followed so far as they are concerned. As to dogs I can see their application. I admit even that men may be included in them, because they have their wives on the farm in winter, and indeed even in their summer pasture camps, a concession which is deemed beneficial because it attaches the shepherds to their flocks, and by begetting children they increase the establishment and with it the profit on your investment." "If Scrofa's number cannot be measured with a carpenter's rule," said I, "neither can many other generalisations, as, for instance, when we say that a thousand ships sailed against Troy, or that a certain court of Rome consists of a hundred judges (_centumviri_). Leave out, if you wish, the two chapters relating to breeding in so far as mules are concerned." "But why should we," exclaimed Vaccius, "for it is related that on several occasions at Rome a mule has had a foal." To back up what Vaccius had said, I cited Mago and Dionysius as writing that when mules and mares conceive they bear in the twelfth month. "If," I added, "it is considered a prodigy in Italy when a mule has a foal, it is not necessarily so in all countries. For is it not true that swallows and swans breed in Italy, which do not lay in other lands, and don't you know that the Syrian date palm, which bears fruit in Judea, does not yield in Italy?" "If you prefer," said Scrofa, "to make out the entire eighty-one chapters without any on the care of mules during the breeding season, there are subjects with which you can fill this double vacancy by adding those two kinds of extraordinary profit which is derived from live stock. One of these is the fleece which men shear or pull from sheep and goats, the other, which is more widely practised, that from milk and cheese: the Greek writers indeed actually treat this separately under the title [Greek: turopoiia], and have written extensively about it." _Of sheep_