I have been teaching my boxer/mastiff to pull up the crab nets to the dock/land and he knows how to go into the water to bring fish & my St Bernard has been trained to being what I call puppy buckets up to me, I have a pulley system hanging from my house & he knows how to work the dog safe pulley system & bring the goods upstairs. it is kinda like potty training or crate training it is constant training & positive training. almost any dog can do their part with proper training. slow training & commands can train your furry family members to "do their part"