crippled valentini puffer

[reefnut]

the valentini is my favourite fish by far so of course iwant to help him but when i went to check on him some of my hermits were eating his tail.ive since put him in one of my sump compartments containing live rock.he seems to have gained some movement of his tail and the color is coming back.i cannot get him to eat so this brings him to almost 24 hours without food.how long can he go before starvation worsens his injuries?