The process of healing and giving potions to the dragonkin took some time. Alice and Su worked together to make sure that they had been healed and checked for any long term injuries. This also worked out since Su was taking the extra clothing the party brought for trading or other matters from Walker's multi dimensional storage. This made things a little more efficient.
In terms of food, the potions Remey had were not perfectly made for the light dragonkin, but the light affinity potions worked very well as a potion that could boost their absorption of light mana and also some nutrients. Luckily they did not need unique healing potions since the natural usage of healing potions spurred the natural growth of healing from within the body and did not function off a singular manas. Meaning Walker noticed it was encouraging life mana.