I have two rescued dogs about the same size, age and weight. First one I got almost three years ago when he was six months old. He's Boston/Sheltie mix and the smartest dog I ever had. Picture a Boston w/ a pointy nose. Second rescue came from a kill shelter in WVA. He's a purebred Dachshund weighing around 23 pounds. He's a great dog and well behaved. I walk them together every single day for over two miles. I used to have two leashes but now couple them together. My problem is every dog we meet and even almost every person they , especially the Boston, bark like little Cujos. ..snarling and pulling. BUT, when my husband takes the Boston and I take the Doxie, not a sound from either when they encounter another dog or person. What's up with that? Is is a pack mentality thing? I have never owned two dogs at one time before. It's annoying as heck.. for me and the people w/ dogs we encounter on our walks. They both go to the doggie park every week and are both fine with the dogs there.