It is quite common to want to adopt a dog when you already have a cat. I know someone who did this but they did not face any issues. In your case, however, your cat has shown symptoms of not getting along with any new member. In most cases, dogs and cats can live together in peace but this process takes a lot of patience and planning. It may not be easy but a few tricks and hacks will make the process easier for your cat. We understand that the safety of both animals is a big priority which is why we need to take some extra care. Introducing them with each other should not be taken lightly. As a cat owner you need to have a plan of action on how the introduction is going to be. Cats are very different from dogs. Your cat probably thinks of your house as his/her own house and might start to feel threatened with another animal’s presence. This is something that you have already noticed. First things first, both the animals should have their own space in the start. It is better to let them be for a while before they start getting comfortable with each other. As a pet owner, we’d suggest you attend to both of them equally. Try not to force them to get along. It is a natural process and should be done in the most seamless way possible. Here are a few points that will definitely come in handy.Your cat should always have a place in the house where she can get away from the dog if she has to. Your cat’s food and water should be away from the reach of the dog.Give a little extra attention to your cat before your dog comes to your house.Learn basic dog training techniques that will help you understand their behaviour a little more.Take your dog out for some time and let the cat understand that he is finally home.Always put your dog on a leash before you introduce him to your cat.Let the two take some time to understand each other.Once you see positive results, you can let him loose.Please note that dogs and cats can actually get along if you make the process easy for both. Hope this makes the entire process smooth for you.