"Oh, Rats!" by Miriam Allen De Ford is a science fiction novella written in the early 1960s. The story centers around a laboratory-created super-rat, SK540, who possesses advanced intelligence due to biochemical enhancements. This work explores themes of power, freedom, and the moral implications of human experimentation on animals, wrapped in a narrative that examines the relationship between humans and a highly evolved species. The plot follows SK540 after he escapes from the laboratory, leading a group of ordinary rats to form a new colony outside the confines of human control. Meanwhile, the laboratory technician Philip Vinson and his wife Norah find themselves besieged in their home by the intelligent rats, culminating in a tense interaction with SK540. As the Vinsons inadvertently become hostages, they grapple with the ethical considerations of SK540's sentience, ultimately revealing the tragic consequences of their decisions. The narrative explores how SK540, in an act of survival against humanity's perceived dominance, takes drastic measures for his kin, leading to an unexpected and unsettling conclusion. The story serves as a commentary on the potential for unintended consequences in scientific exploration and the significance of empathy towards all sentient beings. (This is an automatically generated summary.)