Our Bling! collars and charms are meant for fun and special occasion wear. They are pieces of jewelry, and should be treated as such. They are not meant for strong dogs that like to pull, chew, roll around, and live outside or rough house. They cannot be worn in the water. If your dog pulls hard when walking then you should not use this collar for walking. Wear our Bling! collars and rhinestone charms on occasion, love them and take care of them - then they will certainly last for a long time to come!