Dog Walking/Daycare - UES

Does anyone have personal recommendations of any particular dog walking/daycare places on the UES? In general, how flexible can you make arrangements with dog walkers? I've never needed services like this before but i'll probably need it on and off with a couple days notice at most. If you call a service same-day to make an appointment for a walker is that reasonable or do you need a weekly arrangement. How do services like this work in full service buildings? Do you give them a key (or the doorman?) and leave ongoing notice that someone will be coming to take the dog out 'sometimes'? Seems strange to leave an ongoing notice to the doorman but i'm assuming that is how things are done. Thanks!