Freeze water and chicken stock with toys, carrots, treats, ect. My dog loved this in the summer! I didn't even have to use chicken stock or treats even. I just used an old bowl put some of her toys in it filled it with water and freeze overnight.
The Ultimate Dog Pool. An inflatable pool designed for dogs, made of sturdy river raft material. Available in different sizes: 12 feet x 8 feet x 20" deep (rectangle) , or 8 feet x 8 feet x 18" deep (square). So fun!!!