I'm an absolute dog looover, but I've never been as challenged than with inheriting what we think is probably a Manchester Terrier and min pin mix (I'm hoping to get some diagnostic opinions here, lol) I uploaded a couple of pics (hard to get as she's rarely still.) She managed to make friends w/ our neighbor Great Dane puppy. Yes, puppy. She is 5 mos, 16 lbs, about 14" tall. I've heard that her white toes and chest are not in Manchesters. But I think she's too big for min pin. ? All I know is that she is all terrier. She is craaazy. Maws and nips all the time, altho she now knows how hard is too hard. She's obviously very smart, but I haven't yet discovered how it's a benefit yet..lol. She sees/hears everything, steals everything and runs away, boings around the living room (at times) like a kangaroo, and I can't count the times she's knocked the air out of one of us, as we're lying on sofa and get zero notice of a pounce on the stomach. I hate to add this to your thread, but I share your pain. I broke down in tears the night I was so exhausted from her I simply wanted to spend 10 min in hot bath. She does the non-stop barking anytime she sees something she's never seen before, and it was my first try at a bath since getting her. She sat right at the edge of my tub, barking at me as if I were an intruder. Bath lasted 45 seconds as I got out with a huff and then just cried. Lol. Good luck!
You don't say if you have adopted pup from Rescue Home or bought pup from breeder. Not sure but your pup could be an cross between an Miniature Pinscher & Jack Russell Terrier or similar breeds.
What are you feeding her? How much exercise is she given? What training exercises have you taught her?