[targonrotts]

if he has been vomiting all day, i would not feed him tonight. only offer to lick ice cubes if thirsty. NPO overnight.
if he continues tomorrow, is lethargic, or he has another bloody stool, take him to the vet asap.
it can be many things. foreign object obstruction, HGE, ulcer, ect.
the longer you wait, things can get complicated for him.he will need at minimum a fecal exam, bloodwork and possibly x rays.

if he is back to normal, active and ok, then offer a small amount of boiled chicken and rice. if he holds it and does well, slowly feed a little more at a time and in the next day or two switch slowly to regular diet.

hope he is better, keep us posted.