Re-posting this snippet of a .behavior post here, as it's possibly of
interest

   I'm the same way - on the rare occasions I've had someone else take care
of my dogs, I've had the person ONLY let them out into the fenced yard. The
only exception has been leaving Bren & Morag at Bob's house for a day (I
dropped them off in the morning, came back that evening).

  Good lord. Did they at least get their money back??

Speaking of scary stories..here's my current "favorite" petsitter/walker
story:

 There's a woman started coming to the main park within the last couple of
months with a female Dane who is rather on the aggressive/bitchy side.
Several times, she's had one other dog with her - a sucession of different
dogs - which she doesn't always have under what I would call reasonable
control. (For example, a Lab who was running around the park playing with
other dogs, paying little or no attention to her, and took her 5 minutes or
more to catch the dog when it was time to leave.)
  Seems that she pet-sits for dogs in her own home, and sometimes brings the
client dogs to the park. Which she hasn't brought any who were *major*
problems, but they're not dogs I, personally, would have taken out with me
and let off leash were I responsible.

 But I digress from the actual story... at any rate, a couple of weeks ago a
friend and I encountered the Dane owner while walking laps, and she
proceeded to tell us proudly that the Dane "might be pregnant".
  To our polite enquiry about who the sire was, she replied that she'd been
dogsitting for an intact Cavalier King Charles Spaniel, and had allowed the
dogs to mate. (I'm not clear on whether she encouraged it or it was an oops,
but I got the impression it was deliberate.)

 It gets better.
 THEN she proceeds to tell us how the CKCS's owner was surprised that her
dog had been able to follow through, "because he's got a bad heart". Which
apparently the Dane owner knew beforehand...

 While I stood there with my mouth literally dropped open, the Dane's owner
went on at great length about how she just KNOWS the puppies are going to be
so cute and fluffy, and people are SURE to want them, because who wouldn't
want such a cool "hybrid, and she's SURE she can get $500 or so apiece for
them, and how she can really use the money she's going to make.....

Aside from the mind-boggle of anyone being happy their bitch had been bred
by a male with a known inheritable heart defect, I find myself completely
unable to visualize what the (at this point, still hypothetical) puppies
would look like... other than suspecting they wouldn't turn out "cute and
fluffy">