if you have a sport setting your shutter speed will be much faster as well. I use this setting a lot when trying to get pictures of the kittens cause they shoot off like race cars. LOL the setting works well if you don't know how to change your ISO or if you don't want to use manual mode and set it up yourself for each shot. When you are dealing with animals (especially cats & ferrets) there isn't enough time for full manual so sport setting it is.