Pet Hair is a Fire Hazard
Pet owners have a much greater risk of dryer vent clogs due to pet hair. Drying items that collect pet hair easily, can increase the risk of a clogged dryer vent and restrict airflow. Pet bedding, throw rugs, furniture covers, clothing, blankets, and towels usually contain the most pet hair.
Accumulation of pet hair will wind itself around existing lint and create larger obstructions in the dryer vent line. This poses a major fire risk and decreases dryer efficiency.
Needless to say, homes with more than one pet should have their dryer vent cleaned more frequently.
Below are pictures of lint and pet hair combined.