If You are worried that it might be a health issue you should really mention it to your vet. I agree with you that you should not force her to eat. If there is nothing physically wrong with her then I would definitely stop forcing her. Put her food out and leave it in the spot you want her to eat. If after 10 mins she doesn't eat it take it away. Wait a little while 15-20 mins and then put it out again. Only leave it out for 10 mins at a time and keep doing this till she eats. If there is nothing wrong with her she will eventually eat.