Sorry for my late reply. Your info was really useful. We got our dog from a Tierheim in Frankfurt earlier this year. This is the first time we will be away for a week without her. I suppose the last thing I want is for her to be in an environment that could "remind" her (not sure if dogs have that kind of memory, but still) of a shelter. As there are no website or images of the Dog Hotel I wanted to go & see it, but then I came across a place to the north of FFM, Hundepension
Waldhof.
I went there yesterday and was very happy with it. But I'll definitely check out the Hotel another time.