[Breed To Come is] above-average science fiction dealing with the effects of evolution on a polluted world deserted by humans and dominated by "the People" (highly intelligent cats), the Barkers (dogs), the Tusked Ones (pigs), and their common enemy, the Rattons (rats). As they become more intelligent, physically refined and acquire the knowledge man left behind, the animal races face the problems of their former masters: greed, hostility, fear and doubt. The dreaded return to earth of four humans triggers a chain of events which makes men and animals search their souls for answers to moral questions shared by all intelligent creatures. The story is well written and absorbing. (p. 82)
Virginia Carpio, in School Library Journal (reprinted from the December, 1972 issue of School Library Journal, published by R. R. Bowker Co. A Xerox Corporation; copyright © 1972), December, 1972.