One suggestion - do they have one room that they can close off so the dogs don't get in there? Having a dog-free sleeping space is most important. When we visit Lady's Human, we sleep upstairs, as the door to the upper level is closed off from kitties, and that makes staying there much more doable for me (I have both asthma and a pretty severe cat allergy). If nothing else, while she's there, she should avoid sitting on upholstered furniture, more a kitchen chair into the family room if that will help. That's what I do to be able to enjoy my time at Paul's sister's house, where three black cats reside.

We are too far away for it to be practical for us to have holiday visitors, but we do have many Ohio and Pennsylvania folks on Pet Talk, so there is hope! Remember, Phred is in the northeastern part of Ohio, so not too far from the PA border.