I'm not sure if anyone has put this up yet but here goes:
This is when the thyroid gland under-produces certain hormones.
This under-production can result in the slowing down of metabolism.

Basically,you can be affected in various ways such as weight gain,fatigue,appitite loss etc.

Just imagine a chubby little lion or a sleepy looking one!
(To get a slight idea of what i'm talking about google "chubby,sleepy tiger"/"chubby,sleepy lion")

Anyway this would more likely be a letal since they wouldn't be able to hunt but I thought it would be nice if they could live with it.

What do you think? If you vote no please explain why.(don't overdo it please)
You don't have to say why on this thread you can send me a message!
Fortunately i don't bite. :3 (i will FAIRLY defend myself though)

P.S. People/Animals with the disease aren't guaranteed to gain weight and I don't mean to offend anyone that has this Illness