Hi, this is Dr Loretta and I will be right with you!
Does your girl act depressed? It is very important that she eats since anorexia can cause a fatty liver and this will not be good for your girl. The best thing to do for now is to give her Nutrical, a dose every 4 hrs during the day. This can be purchased at the pet store and will act as an appetite stimulant. If this continues, your vet will have prescription appetite stimulants that may help. There may be a medical cause for this so your vet may need to run further diagnostics such as xrays and ultrasounds to find teh cause for thsi anorexia. Good Luck!