Hi. i have been reaserching this breed and have some questions that i couldn't really find the answers to. in terms of exercise, does this breed have to be pulling some sort of heavy weight? Would it be ok to just go out in a park or feild for a run around? And for how long? Aslo, are these dogs ok not living in cold climates with snow? Are they harder than most breeds to train and house break? Thank you.