September Dog Sitting/Boarding Options in Lisbon?

Hello:

I may need to go out of town for a few days next month and wondered if anyone knew of some options for dog-sitting/boarding in Lisbon, as I cannot take my dog, who is a well-behaved, 4yr. old, neutered, Black Lab mutt. I live near the Rato Metro station, and have already visited the vet on Rua São Bento, and know they offer kenneling services, but am hoping for someplace more comfortable. I don't have a car, so I'll need someplace accessible via subway.

Any suggestions?

Many thanks!