You need to make sure that your puppy is getting a really good puppy food and that she is eating properly. Also a breeder of poms recommends adding caro suryup to your puppies water.
Also the signs of an episode is being lethargic, and not wanting to do things that she normal does. You need to learn your poms habits and quickly. If she is hypo it can cause seizers which can rapidly lead to death.
If you see any signs of this then you need to get your pup to a vet ASAP. I hope this helps.