Update Katia, 31-03-2017:
Katia, who we her foster parents are calling Pluk - is a super faithful litte terrier cross, who is mega affectionate and who is therefore already happy to walk freely in the safe places. She must have previously lived in a house, because she is housebroken and walks nicely on the lead and can be home for a few house just with the other animals. She doesn't bother the cat and plays with the other dogs. Plukki is smart, always cheerful, extremely curious, very generous with her professions of love and is so very cozy and present everywhere. She is a great companion!
Katia on YouTube https://www.youtube.com/watch?v=LcvtnnsN4A4&feature=youtu.be
Her details can be found here.