when they treat the pet as though it were human
Keeping them outside all the time.
Breeding them over and over again for $$$$.
Treating them like babies instead of pets.
Giving them food like bakers, not training them properly (sometimes to the extent that the animal is shut up in the kitchen all day)(also in the case of small dogs where people don't think training them properly matters and mollycoddle them, giving them a bad name), giving them food which is unhealthy, allowing a dog to be dominant (purely from ignorance, not because it is their personal preference) not looking into an animal before getting one, giving animals away, having animals put down (no animal would choose to die or want to, therefore euthanasia is a stupid term to make it sound like they are doing the right thing) the list could go on and on....
Neglecting them, keeping them in cages all day, starving them, keeping them outside in the winter, not cleaning their litterbox, cage, etc.
Tied to something all the time. Malnutrition.
Many,many things,but one common sight is people walking their dogs and seeing it purely as a circuit which is to be completed as soon as possible,not allowing their dog to sniff and smell the surroundings.
A correctly trained dog should not be sniffing its surroundings on a walk. This often leads to an unenjoyable walk, so they should be trained properly.
I dont want "a correctly trained dog",Im more than happy with my incorrectly trained dog and all her lunacies.
Putting clothes on them and giving them high class people food...