What does the fortune teller mean when he says that two horses can't be in the same slot?

What the fortune teller said has something to do with what the older generation said. Two horses can't be in the same trough, which means you are both horses, and then you are together. It may be that marriage is not harmonious, and one horse will rob another horse. That's what it means. As people say, dogs and dogs cannot form a family. Why, dog bites dog, chicken and dog are not worthy? This is just a general and literal understanding, but if two people want to live together, the key is to look at their personality, which has little to do with the constellation and zodiac people say.