There are many great dogs out there in rescue just waiting for a loving home. Good rescues vet their dogs carefully and there are loads, even greyhounds, who are very cat friendly. Greyhounds dont require excessive exercise, and are usually real couch-potatos.
Here, to prove my point, is my rescued Lab Forrest with Lily when she was about 7 weeks old. I got him aged 17 months and he had many, many issues! Some of these we lived with until he died aged 13. He was the most frustrating, intellegent and funny dog I have ever had.
BTW, he had never even seen a cat until I got my first one, Angus, when I had had Forrest about 12 months. Angus was about 18 months when I adopted him, and again had never lived with a dog. When I later had a litter of pups, Angus used to get into the whelping box and snuggle up with them.
I have fostered many dogs and puppies, and never had an issue with them around cats. Its all down to control of the dog, and training.
I also once took in an 15 yr old, 3 legged cat called Sooty-cat after the owner died. He was so confident around dogs, he would go into neighbour`s houses and steal their dog`s food, and boss my lot around. He even came to the dog training classes I ran to teach puppies how to be nice around cats.
Forrest and Lily -
And Issy the spaniel with foster kittens all snuggled up. She makes a fab hot water bottle!