There is no written formula for a good coexistence between dogs and cats, but the truth is that animals can adapt to another species easily, especially considering how friendly dogs are. In general, cats and dogs do not have to get along. They are two different animals, with different needs and ways of communicating, but this does not prevent them from knowing and respecting each other.
In the vast majority of houses that they have cats and dogs It can be said that they have animals that have been properly socialized, so that they can be with other animals without any problem. The most difficult thing will be to introduce a cat into a house that already has a dog and vice versa, because at first it can be difficult for them to treat or get along, but everything is a matter of patience.
The most important thing in both cases is that the animals have been well educated since they were little. It will not be difficult for a cat or a dog that has met other animals, that has dealt with them and that has had friendly relationships to meet another animal and live with him, sharing his space. This is one of the main guidelines for the coexistence of both, who have been well socialized as children.
The best way for you to get along is that grow up together, But this is not always possible. If we have to introduce a new cat or dog to our pet, we must do so safely first. Let him smell him and get to know him when he is in the carrier, as both of you may be scared or suspicious about the new situation. It's a matter of getting used to each other's presence and enjoying each other's company little by little. But always controlling the reactions of both from the beginning, so that there are no problems.