Yikes. My personal rule: one dog per person, must be able to carry the dog out if the dog is injured (not judging those who want to take their larger dogs hiking). Booties and/or first aid are always with me. Pay attention to the dog and check paws regularly. My dog will keep going with an injury and is a master at compensating so limping isn't always obvious. Hope the dog's owner learned from this and will be more mindful in the future.