Actually, a dog is incredibly lonely if it's home alone. Because its owner isn't home, there's no one to play with, and it can't do anything. Even the thought of sleeping at its owner's feet feels like a luxury. So, having a companion makes things much better for a dog. However, you must be careful when choosing a companion for your dog. If the two dogs are constantly fighting, or chasing each other around like rabbits, it's definitely not worth it.
Of course, cats are also a good choice, but cats and dogs can be very turbulent. It's either the dog bullying the cat or the cat bullying the dog. There aren't many cats and dogs that can get along well.
In Journey to the West, Sun Wukong was imprisoned under the Five Fingers Mountain for 500 years. These past few days, he encountered a dog that looked like this:
Its little eyes looked particularly melancholy as it gazed longingly at passersby. Upon seeing this, everyone teased it, saying, "Hang in there, Sun Wukong! Tang Sanzang is coming soon!"
But don't worry, everyone. It's not that we didn't want to help it; it's just that after we pushed its head back, it stuck it out again! It was clearly just trying to see who was passing by...
Perhaps every dog wishes it could run alongside its owner...