Hey all, We are experienced dog owners and have owned a doberman in the past, but never a bullmastiff. Loved our doberman, but have always wanted to try a bullmastiff. We have luckily found a "european" line of doberman breeder (for those of you who are avid doberman fans, you'll probably know the difference between the american vs. european lines) and are very excited since those lines are the only lines we'd be interested in. In fact, both the male and female were imported to the states to help improve the breed's medical issues here in the US. My question is, are there any members here that have owned both breeds? If so, I'd love to hear from you. We currently have a mixed-breed mid-sized dog we rescued from the local shelter. She's approximately 8 years old now and has been a wonderful dog. We'd like to find her a friend since she's still very active. My wife and I love dogs and are torn between a high-energy dog and a low-energy dog (doberman vs. bullmastiff). We are just looking for a great family dog that will provide a measure of security, be extremely affectionate towards our entire family (including kids and other animals) and be a good playmate with our other dog. Not too interested in showing or other types of competitions. So, do any of you have any opinions concerning these two breeds?