Because the nights were so different, so much longer than the days (at least three times as long), and so full of fear. Squirming in his burrow, while the great animal, senior and atrocious, tore greedily at the narrow opening, the little puppy had no thoughts for the day-the distant, the derisory day. He didn't understand. How had he unleashed such rage in a creature which, or so he felt, he might have looked to for love, for protection, for play? He didn't understand. But he understood one thing; he made a certain distinction, a nice one too. The little puppy understood the difference between, terror and horror. Terror was when the girl had gone and night began to come, wiping color from the world. Horror was when the beast was actually there, the flames of its breath at the opening of the burrow, the saliva that seared the little puppy's rump.

"This can't go on," said Andromeda one morning, when she found the little puppy sneezing and dozing and trembling by the nervous creek. He couldn't eat the food she had smuggled out for him. Reflexively he lifted himself up for a romp, but his hind legs gave way, and he rolled back on to the grass with a fatalistic sigh. Usually when she looked at the little puppy Andromeda always thought: life! Here is life. But now the possibility occurred to her (long-postponed, an idea that made her whole body bend with nausea) that the little puppy was dying. It could be that the little puppy just wasn't going to make it. For you understand that fear had quite emptied him-fear, and intense puppy loneliness, the need for inclusion, the need to be… inside.

Andromeda gulped and said, "I don't care. I'm taking you home with me. Now. I don't care."

And so, very, very carefully, Andromeda bedded down the little floppy-limbed puppy at the bottom of her basket, and covered his weak protesting form with flowers and white grapes and a pink handkerchief. The little puppy was slow to understand this game and would persistently writhe and struggle, and seem to grin, and then play dead. "Shsh," Andromeda kept telling him, but he went on whimpering and elbowing about until at last he was aloft. The air-travel appeared to soothe him. A mile from the village, on the brink of the enfolding hill, she plonked the basket down, lifted the hanky, and gave the little puppy a good talking-to, with much play of the raised forefinger, the stamped foot, the meaning frown. In fact the little puppy was so flummoxed and confused by this stage that he stared up at Andromeda with candid incuriosity-and even yawned in her face. On they went, down into the ringed village. "Good day, good day," came the voices, and Andromeda sang songs at the top of her voice, lest the little puppy should unwarily choose to whinny or yelp. But the little puppy was very good and didn't make a sound. (To be quite honest, he was fast asleep.) When she reached the cabin Andromeda got up on tiptoe and peered in. Keithette was not about. Nor was Tom. So little Andromeda took the little puppy straight to her little room.

Now Andromeda had a lot of explaining to do (this had better be good!). And so, come to that, have we.

As things now stood, the village was the food of the dog -and the dog was, if not the worst of all possible dogs, then certainly the worst dog yet. The genetic policemen and bouncers that once kept species apart had loosened their hold on the living world. In less temperate zones than where lies our scene, there were creatures that limped and flapped in strange crevices between the old kingdoms, half fauna half flora, half insect half reptile, half bird half fish. Natural selection had given way to a kind of reverse discrimination -or tokenism. Any bloody fool of an amphibious parrot or disgraceful three-winged stoat had as much chance of survival, of success, as the slickest, the niftiest, the most singleminded dreck-eating ratlet or invincibly carapaced predator. Many human beings, too, were mildly dismayed to find themselves traveling backward down their evolutionary flarepaths-or, worse, sideways, into some uncharted humiliation of webs and pouches, of trotters and beaks. People, of whom there were few, tended to thin out near the deserts, of which there were plenty. In the deserts the lower forms flourished unchecked in their chaos: you could hardly turn your head without seeing some multipedic hyena or doubledecker superworm pulsing toward you over the mottled sands. The village lay to the north, not too far from the glasslands of ice. At these select latitudes, after its decades of inimical quiet, the planet earth was once again an hospitable, even a fashionable address. With so much food-with so much space and weather- nature had little selecting to do. Until the dog.

Perhaps the dog, then, was the Natural Selector. The dog was eight feet long and four feet high, very lumpily put together, the rolling, snapping head loosely joined to the top-heavy shoulders. In place of a tail he sported an extra limb, bare tibia, tendon and talon-quite useless, and far from decorative. His eyes were a scurvy yellow, his saliva a loud crimson, venomous and also acidic, capable of entirely dissolving human bones. The dog was the beneficiary of a new symbiotic arrangement whereby he healthily played host to several serious but by now ineffective diseases, his numerous parasites having (in this case) taken on rather more than they could handle. In times of yore the dog ate pretty well anything he could keep down, like a shark. These days, though, he was exclusively, even religiously homovorous. He looked bad on his diet. There never was a clearer demonstration of the fact that you shouldn't eat human beings. The dog's chief personal breakthrough was his coat, which was thick, patchy, fungoid and yet synthetic-looking, too shiny, like rayon or lurex. He was the first dog to earn a crust, to eke out a living in the northern lands. The village was his food. He seemed to need about one human being a week. He wasn't all that greedy, and human beings, he found, went a long way.

Nobody in the village had any idea what to do about the dog. Well, they had their shameful strategy; but it wasn't working. Idlers in a rejuvenated world, they had long lost the noble arts of survival and advantage, let alone fighting and killing. No one knew how to raise hell anymore. They milked the land of its rich life: indeed, some of the plants were as nutritious and sanguinary as meat itself; yes, many plants bled. They used few tools, and no weapons. Even fire they hoped soon to foreswear. This was the way the world was now.

For the next couple of days the little puppy was so very poorly that Andromeda was able to keep him bedded down in her clothes cupboard without much fear of detection. Sometimes, in a trance of foreboding, she found herself on the brink of resigning herself to the loss of her new friend. "Stay," she would whisper to him urgently. "Don't leave me. Stay, oh please stay." At night Andromeda brought the little puppy a selection of juicy vegetables and encouraged him to eat. He seemed grateful for the sympathy, for the comfort, but turned away from the food, and sighed his long-suffering sigh. Then on the third day… Well, Andromeda was slowly eating breakfast with Keithette and Tom, her mother and "father." In the silence the sun played subatomic ball with the moody motes of dust. Both Andromeda and Tom were eying Keithette a little warily. No one had spoken with any freedom that morning, because Keithette had yet to select and announce her mood-day. There were seven to chose from (all different now, all sad days, since the dog): Shunday, Moanday, Tearsday, Woundsday, Thirstday, Fireday, Shatterday… Tom was crushing henna into a mortar bowl and saying, "I prefer the single braid anyway."

"Why?" asked Keithette pitilessly. She was a rosy, broad-faced woman, stocky and flat-chested (the standard female form these days); but at such moments her mouth looked as thin as a fissure in glass. "Why? Please tell me, Tom."