I just recently noticed that one of my pets (a hatchling) went from having over 300hp to having just 100.
Here's the pet in question:

http://www.sylestia.com/view/pets/?petid=767166

I've actually noticed this happen with several pets but do not happen to have their links handy. I don't remember exactly how much HP she had before, but I know that a ryori with parents whose health is easily over 300 should not have just 100 health, especially since she had more before.

I'm not sure if this is relevant, but her HP was never at 100% before; she gained 20 health when hatching so the meter was never full. Now, it's at 100%, of course, but she somehow has only 100 health.

Any ideas on why this is happening?

Hm. I thought I had fixed this but it appears it didn't work.

I attempted again and will continue to monitor to make sure it's working properly.