Bennie, the problem is not buying mixed breed dogs, the problem is buying them without knowing they are not purebreeds. If the original poster wants a Cavalier and Poodle cross, she should at least know what she is buying, and that she may be giving money to a puppy mill.
If she wants to buy with all the information, no problem on my behalf. I only say there are cavalier and poodle rescues where she may find the mix she wants without paying so much money. This has been discussed a lot of times, and I'm going off-topic. I just had to say it.
I suppose owners of smaller breed will be better at answering the question posted...