Not a dog’s chance, or one more impenetrable etymology
By this time, the thrust of the posts united by the title “Not a dog’s chance” must be clear. While dealing with some animal names, we plod through a swamp (or a bog, or a quagmire) and run into numerous monosyllabic words of varying structure (both vowels and consonants alternate in them), lacking a clear etymology, and designating several creatures, sometimes having nothing to do with one another (for instance, “doe” and “grasshopper,” though this is an extreme case).