Those flat noses, although adorable, can also lead these playful little pups to have some complications with regulating their body temperature. Blue french bulldogs, and french bulldogs in general all have this trait. Being mindful of it is the first step in caring for your frenchie. Make sure to keep them very warm in the winter time since they also have a very thing coat of hair along with the small nose which can lead to them having some minor doggy colds.
Having clothing and blankets for them can do them a world of good. Also make sure to watch them as they play in the direct sunlight. The heat can cause them to become exhausted quickly. Give them a bit of shade for a bit to let them cool down. Again, just being mindful of your blue french bulldog will lead you to catch these things quickly.