I've had my dog for 18 months and she has 'never' urinated in the house. During both visits to my Dad, both in his home and in his new apartment, she has done it...and right in front of us...several times. Her walking/eating schedule has been the same, in fact, twice, we had just come from outside.
Before we return to see Dad this weekend, I'd really appreciate some ideas as to 'why' and possible preventative solutions...before Dad forebids us to visit:-)