Patellas & Stifles
Toy dogs are prone to “weak knee joints”. It is best to not let your puppy jump from high places such as beds, couches, etc… as this could eventually weaken those stifles and patella’s. Also, when brushing your dog’s long hair, do those legs gently.
Please note that at the age your puppy goes to its new home the bones have not completely grown together. Therefore excess walking, running, and jumping could cause problems later on. Let your pup be a puppy and have lots of fun and playtime. Just not in excess is my recommendation.