Hi Sandra, welcome to the dog side. I was also looking at the links that Krista posted and I noticed that the two chihuahua mixes were both listed with Mutts4all (I think that is what it was). They also had on the main page of their website an application to be filled out by all applicants. It listed a lot of questions as to what type of dog you were looking for and why. Just a thought, but maybe you could fill out an application with that (or another) rescue organization indicating basically what you told us, and they may contact you when they find a dog that will fit with your lifestyle. That way you can also request that the dog be cat friendly. I am sure they keep some sort of database with that information. I love that you are willing to take in a senior dog. I hope you find the perfect little companion.