Hello My family are looking for a dog breed which might be good for us, we're looking for a dog that is medium or large in size, good for training, normally a healthy breed and doesn't usually require over 2 hours of exercise daily? We were thinking about a border collie, but are worried we wouldn't be able to provide enough exercise for them (probably 1 hour and a half to 2 hours a day, sometimes more). We've owned one dog before and plenty of other animals so have some experience. Any recommendations? Thank you in advance!