Wow this is a tough one!!!
Does she eat treats? I think what you may have to do is ONLY offer her the regular kibble. If she does not eat it, put her dish up where she cannot eat it. Then offer it to her again at dinner. Same process. Then the next morning. Then the next evening. Perhaps she does not like the kibble you are offering? It happens on rare occasion that a bully just does not like the smell of a particular food.
It is quite possible there is something wrong with her- but it is also very possible she likes the dropper feeding method and could possibly be training you to spoil her. Just make sure she is hyrated and if she still refuses to eat after the above process, definitely take her to the vet again.
P.S. We love pictures, can you add some of your new bully baby?