Another thing that bothers me, is when I’m out walking my dogs and note the large numbers of small dogs kept in garages all day, and often at night, regardless of the weather; not much better (sometimes worse), when a dog is left endlessly in the back yard. They yip and whine piteously.
Small dogs are bred to be companions to people. All dogs are pack animals and need to be around their pack, other dogs or people. They feel anguish, over this.
Animals, especially relatively highly evolved ones like dogs, have complex feelings. They suffer from loneliness and neglect.
People should not get dogs if they can’t provide them more attention than that. Such dogs, too, are rarely, if ever, taken for walks…something dogs really need.