Puppy Bone Souper Nylabone Puppy Bone Souper for Large Teething PuppiesPuppybone is made from inert thermopolymer to which calcium has been added during the moulding processPuppybone is strong and durable but the addition of the calcium being a natural material makes the product a little softer than Gumabone and is suitable for use by very young dogs whose jaws and adult teeth are still developing Remember that as he grows he will need to progress to a larger chewChicken FlavourSouper 8 in approx for puppies up to 50lbs