Boots, sweaters and coats for dogs will help them brave the cold weather. Check for ice between their toes when they come in. The ice can cut them. Clean up any spills if you add antifreeze to your car and get your pets used to having their paws wiped off when they come in. Doing this will prevent their paws from being burned.
Some people believe in keeping their pets outside.
In order for your pet to bond with the family and become part of the family, your pet has to be in with the family. However, if you do keep your pet outside it needs to be protected. This is nothern Illinois. The winters are long, very cold, cloudy and wet. Your pet must be sheltered from these conditions.