A friend for Draguta in Tempelhof

My partner and I would like to find a friend for our dog Draguta. She is with us for half an year and is 2,5 years old. Draguta is sensitive and calm dog. She deals well with other dogs. We usually go to Tempelhof and Viktoriapark. We'd rather prefer not so big dogs, she is 10kg and 40cm. It would be nice for her to have some friends to play!