okay so I need some advice. I currently have a adorable maltipoo Luca Miles who is my world, I also have a cat Gracie. however my roommate and I (2 girls) will be moving in the distant future as of right now we live in our hometown in a apartment that's connected to our landlords house if that make sense. when we move we'll be moving 3 hours away from our families. Luca and Gracie will of course be coming. when we move we've discussed getting a guard dog nothing set in stone just been googling and gathering information. we've narrowed it down to a doberman, bullmastiff, German Shepard, or a rottweiler. I'm just wondering if anyone has any suggestions on what kind of dog will be best suited for our little family or any tips. it doesn't have to be any breed listed. A dog that gets along well with other pets. I just want to ensure that Luca and Gracie will be safe. its always just been the two of them and they are very close. I'd also like tips on introducing another dog. Luca nor Gracie are aggressive by no means. Luca is very aware of his size and wants to be picked up if another dog comes near him. I also am leaning towards getting a female. anyways thanks in advance!