kind nest
I was feeding the Red Jaw Dragon I earned from the recent Primal event, and when it it Lv4, it suddenly shrunk...? I tend to throw the food so I threw the food but it wouldn't eat it. This was fixed after leaving the habitat and then getting in again.
regal ether
Honey, I shrunk the dragon
proper iron
Okay, I really didn't expect that 
. Seems like it's was super random occurrence, but if it happens again do let us know and I'll ping the team to look into it. 