A 'standard' jagdterrier is a VERY VERY big handful. I have had a few, but the only two I kept were an aunt/nephew pair. The female (briar) is 10, and her nephew (jaeger) is 2. She is an incredible dog, you cannot find a better behaved dog nor a more intelligent dog. I do not however trust her around my chickens, because she will kill anything that doesnt belong on the place (excepting a dog or housecat) and she hasnt decided the chickens belong yet, lol. Jaeger is the one I thought I had to worry about, he is laid back, basically like a semi-calm JRT, but he doesnt seem to pay the chickens any mind at all. They are much more like JRT's than jagds. I wouldnt have a jagd that is like they have been bred to be like. Miniature pitbulls of the worst type.