Unused dryer sheets contain concentrated cationic detergents; used sheets are obstruction hazards.
Dogs that chew or swallow dryer sheets risk both chemical burns and intestinal blockage.
Dryer sheets are saturated with cationic detergents — the same caustic class as fabric softener. The sheet structure also makes them a recognised cause of intestinal obstruction. Used sheets retain less surfactant but are still problematic.
Sources
Any swallowed sheet warrants veterinary evaluation, both for chemical injury and obstruction risk.
Contact your veterinarian or an emergency animal poison hotline immediately. Do not induce vomiting unless instructed by a vet.
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