Hello. I just got a Min Pin a week ago (7 years old, no idea if she has had any shots and the previous owners said she had a cough her whole life ) and for the first few days, she was the perfect dog. Then the third day she peed on the floor. I thought it was because I did not take her out in the evening to do her business. Then 3 days ago she threw up about 15 times all over my house ( a white foamy slimy yellow substance ) and pooped two huge poops one in each room (I have never seen her poop this much). She was eating fine and we would go on about at least a 30 minute walk 2 times a day. I researched the internet and I took some advice that she should go without food for 24 hours, drink plenty of water and hope that whatever may be stuck in her intestines will be passed. I am with her 24 hours a day as I work from home, she was drinking fine and her cough even seemed to go away. The only unusual thing I noticed is that 4 days ago she drank some water that contained manure. Now and since yesterday she will not eat or drink anything, she's very lethargic and yesterday when we went on a walk, she was not up to her active exciting self. She was slow on her morning walk yesterday (I thought the walk would boost her appetite, it didn't ) and she wouldn't even go on a walk last night. She barely walks now and spends most of her time resting peacefully.

Hmm.. a dog that coughs all the time, all of its life.. Sounds like collapsing trachea to me. A good way to see if it is, is to go to the vet and have an x-ray done. Small dogs are very prone to it.

As far as her vomiting. You need to take her to the vet. At home treatments aren't always the best. Keeping her off feed for 24 hours is only taking away the fact she is vomiting up food. She is still nauseous. Keeping her off feed and just allowing water won't make her pass any type of obstruction.. it'll just make the symptom of vomiting go away :)

Your dog needs a vet.. today. Please take her in.