Others may have more experience than I do, it when my pup loses her appetite and any vomiting happens I go to plain rice and boiled chicken and maybe a little cottage cheese.
If they are vomiting I don't push the whole food thing, give their tummy a chance to settle down.
I am sure others will help, but if it gets any worse it might be a good idea to seek a vet.
Good luck!
__________________ .   Cali  , and Cali's keeper and staff, Jay No, not a "mini" Yorkie - She loves to motor in her Mini Cooper car  |