After a dog falls out of love, he will suffer from loss of appetite, sad expression, insomnia, etc. Dogs also have feelings, so they will also fall out of love. When dogs are lovelorn, they will be as depressed as humans and don't like to eat. At this time, the owner should play with the dog more to divert the dog's attention. You can also bring the dog into contact with other dogs, so that the dog can also will be happier.