Responses
SPOILER!
Continue at your own risk.
Apparently the farther the dragons are from Hiryuu castle the weaker they become. Hence, when they kept so close to the kid who was sick they caught the illness as well. The disease is especially bad when adults get them.
Interesting tht would make sense, sense they where there to protect hiryuu.(づ ̄ ³ ̄)づ
What the hell just happened!!