Oh, thank you all so much for responding! I wasn't sure if anyone would be interested in my dilemma.
You are giving me a lot to think about. I've never owned a dog before. (And still not completely convinced!
)
Clearly, the three of us are due to have a very serious talk about all of this. The boys (I refer to Hubby & son this way) must convince me they are really up to taking care of this additional pet. I liked Noddy's suggestion about walking, and I think I'd add a few things to it. Like, for the same month, they're totally responsible for feeding & cleaning up after the cats. (Less work than a dog, right?) That shouldn't be a very hard test.
Also, I think if this is what they want, they need to do the legwork necessary to convince me. They should be the ones checking out various breeds, training courses, costs, etc. (Not that I won't double-check behind their back, of course, but the primary responsibility should be theirs, no?)
I'm glad to hear all the remarks about dogs & cats living together harmoniously. My two cats have never been around a dog...we got both of them as small kittens from a vet who had raised them. However, they are "scaredy cats." Anytime a new person comes in the house, they both dive for cover. Even my cleaning help doesn't see them for 6 months at a time. But surely they would adjust? I am guardedly optimistic.
We have a good friend who owns a Bichon, and we're trying to talk him into coming to visit (he lives out of town) for a weekend and bringing the dog with him. Just to get a taste of what it's like to have a small dog in the house. Good idea?
Anyway, we're FAR from making a decison about this. But I do thank you for all the good advice and support. Keep it coming!