A friend is offering a English Mastiff Rott mix to me after the litter is born. I know nothing about the breed as a mix. If anyone out there has one I would love to talk to you and get some info about them. I already have a Newfie who is approx 6 (human) years old. I will NOT give him up as he is part of the family but would like to introduce a new member to our clan and maybe the new puppy will help him be less of a couch potatoe. I guess I need to know their temperment, how big they can get, how long do they live, can they stand being home alone, will they travel well. Things of this nature. Thank you in advance for all your help and I look forward to talking to you.