"A dog's life", where did the expression come from, what meaning does it carry?
For Russian people, a strong manifestation of something was associated with a dog. A dog's life means life is nowhere worse, a dog's cold, also extreme, unbearable cold, bullshit, sheer nonsense. In short, everything related to the dog is an extreme measure.
It means a nightmare life, a bad life, a dog's nightmare. This expression comes from the reverse reading of the Arabic word kabos - nightmare. A dog's life is a nightmare. One nightmare in Russian, another in Arabic.