Like Duo should be giving advice about taking care of himself. After all he had only complained about being tired on the way to see Quatre.

"You're both going to rest for now. I'll take watch." Heero stood and shot Duo a look which said 'don't you dare argue with me'. He had recovered mostly from his attack and he wasn't refusing the gruel the castle fed them. So in comparison to the three he was right on top.