The Saint Pyrenees enjoys running around outside so it is best if you have a large fenced yard for her to play in. They are big dogs so they do not do well in small apartments with no yard. They do tend to be lazy and your dog may become overweight if she does not get at least one hour of exercise every day. Also, dogs who do not get enough physical and mental stimulation can have behavioral problems due to boredom or anxiety. Some fun activities for your Saint Pyrenees include going to the dog park to play with other dogs, hiking at the local park, swimming, playing fetch, going for long walks, and they even enjoy agility training.