We have boarded our dogs at the Animal Inn each time we come to Las Vegas. We usually get to Vegas about once a year for the past 8 years.
Our last stay was in April of 2010, and we had just the one dog that time (sometimes we have two).
They have always had our reservation, we fax the shot records and there has never been an issue. The staff has always been friendly and seemed concerned about both our dogs stay, and meeting our travel schedule.
The dogs come out clean (sometimes a little damp from cleaning), but we have always had good experiences, and the dogs always seem happy.