As a response to my post about a fox in my garden, my old friend Owl sent me a link to an article on domestication of foxes. The article is in Russian, which makes it unaccessible to most readers, therefore I put here a key picture:

Selection of foxes in the direction of greater”domesticity” leads to emergence of dog-like features, like a curled tail or soft ears.

I am happy that the experiment (started 50 years ago) continues: as a student of Novosibirsk University, I almost every day walked past kennels where experimental foxes (ancestors of the one featured above) were kept.