When it comes to dealing with hypoglycemia, any toy breed puppy at an early age is at risk, yorkies being more prone to it, and other tinies as well. Hypoglycemia is when a puppy's blood sugar drops. They may have a seizure, their eyes may roll back in their head, they may just become very lethargic, they may be stiff........................whatever the symptom it is very scary for the family that has the pup and much more scarier for the pup itself. Alot of times people assume a pup is eating if it has food and water in front of it. This may be the furthest thing from the truth. When you first buy a puppy and take it home you HAVE TO KNOW that the pup is eating. You have to physically SEE IT EAT. They eat little bits of food all throughout the day. Alot of times this is why if you try to put them on a feeding schedule right away a problem may arise. Let the puppy acclamate first and get to know you. Let him or her get used to the routine of the family and totally learn to trust. Then if you want to place them on a feeding schedule later you can. Sometimes I have people give the puppy some vanilla ice cream morning and night for the first couple weeks. This way they physically see the puppy eat and therefore know they are getting sugar in their system. There is a product called nutracal and many others like it that you can administer to the pup daily to help with this also. Never take the puppy places with you for long periods of time and then bring him or her home and place in their area and assume they will eat. They may be too worn out..........................go to sleep, wake up and still haven't eaten and then you can run into a problem. The key to hypoglycemia prevention is to pay attention to your puppy and what it has eaten. It's just like when parents bring a newborn baby home from the hospital. They make sure certain needs are attended to and eating is definitely one of them. So pay special attention to your pup when you first get it and make sure it eats something many times throughout the day and you keep the metabolism burning and the hypoglycemia at bay. This makes for a much more easy transition for family and puppy!