I've had dogs ever since I was a little girl and I've always enjoyed taking them out on walks. We moved to Chester five years ago with our King Charles Spaniel and I relished walking him through the woodland pathway in my village. We got a Patterdale Terrier roughly two years after moving into our new home, as a birthday present for my younger brother who has various mental disabilities. At that point all of my siblings were in education and my parents were both working throughout the day to scrape a living. Walking the dogs became a less frequent event and letting them out to run the stretch of the garden became the new thing, and as this occurred in the Patterdale's younger years it has had a profound effect on her. I noticed that the female patterdale is extremely nervous and protective over us all but especially over my male spaniel. Taking her on walks or on holiday has become a nightmare and we now all avoid doing such things. She will bark very viciously at people, cars and other dogs whenever walked. She will whine and bark to herself throughout the walk and will actually have diarrhoea. Letting her off the lead is not an option as I am petrified that she will bite someone or another dog. If I approach another dog with her she will lower herself into a stalking position then will suddenly burst into barking fits. She completely ignores any commands and will not fall to the temptation of treats which I try to use as a bargaining chip. I actually have to walk the dogs separately as the terrier cannot stand it if our spaniel walks ahead of her, she barks and whines even louder than usual as though worried he might vanish! She has never bitten another person or animal, whenever confronted by a larger dog she is worse and more defensive although if the other dog starts to play with her or gets close to her she will calm down to a degree but will be very tense and tends to snap at the air if the other dog is too shifty or creeps around her to where she can't see it. She will usually bark at people if they're at a distance from her, for example she recently barked at an old woman who was gardening over the road from us whilst I was walking her, the old woman came over and greeted her and she stopped barking and acted like a sweet little angel. She is great with kids and people in her own home, she's the perfect lap dog and loves attention but whenever she is put into an environment she isn't keen on or doesn't know too well she gets very defensive and people are starting to interpret this as aggressive and I'm too embarrassed to walk her. I now have more time on my hands and would like to start walking my dogs again, I just don't know where to start, our patterdale is now turning three years of age and needs introducing to other dogs I just don't know how to do it safetly, please help!