A Yorkshire Terrier’s rapid growth already reaches a climax at the age of 2 months. It keeps on growing until about 10 months old and in those last months of development it gains weight slowly and its bones harden. It still needs twice the amount of energy that an adult Yorkie needs. It is quite important that special care is taken to enhance a Yorkshire puppy’s immune system, as it cannot form its own anti-bodies straight from the start – it needs to develop over time. Royal Canin’s Yorkshire Terrier Puppies is the perfect choice for your puppy until he reaches the age of 10 months. The enriched formula maintains its long coat and reduces tartar with calcium binding agents.