Dog’s world is crazy. Imagine living in a totally alien environment after being separated at birth from your family. Then you are (usually) forced to live only with other weird animals that control every aspect of your life. They speak a confusing language and expect you to understand it, you are often heavily punished when you get it wrong.
The few parts you understand make you insanely happy because you finally get to connect with something. When you do get a tiny bit or freedom to walk, you see others of your kind in the same condition. Some can take it others cannot and get aggressive at you on mere sight. Each time you come close to one of your kind, it is a fleeting moment that you wish could last forever. Another dog that barely understands you because you are both so used to being confused.
You try the best and sometimes the other dog and you get along, others time you do not. You start to believe other dogs are evil and that is why you are kept separate. You start to dislike other dogs, they are clearly the enemy. One day you are finding it particularly hard to understand the arm flailing scream monster when you have patiently waited as long as you can to go to the toilet, and then you get beaten again and screamed at and you decide ‘Sad this shit’ and nip them back.
Then you find your whole world thrown upside down, the masters are gone, you are unsure how you will get fed, you understand the new masters even less so clearly they will be more angry. You hear other dogs equally scared around you, this must be dog hell. Life for a dog is a series of insanely confusing situations dotted with small injections of cuddles and happiness of walking. They accept that life is beyond comprehension.