My 2.5 yr old Bull Arab x (who came to us as a 'Staffy x) becomes very hyperactive (by by barking to the point that she sounds like she's in pain as well as constantly pulling) when she either sees another dog and cannot close in on it, or hears another dog (in this case our neighbours' dog). I use a harness to walk her so she doesn't harm herself but taking her for walks becomes a major hassle. This behaviour also affects her ability to play with other dogs as she will often single out a dog to play with and get to the point where she will latch on to the other dog's neck. The only time she plays well with other dogs is when she's in a pack of dogs that are her size or larger. Does anyone have an ideas?