My budgie has been vomiting for a few months already, we have been giving her medicine but it doesn't really help much. Its poop is normal and it still eats regularly. The thing it vomits is like yellow seeds but different from the seeds we give it. It usually just swing its head and the 'seeds' just flew out along with its saliva, but it will then dry up. The problem has been bothering us for a quite long time as other budge will eat those vomit sticking on the bird cage if we did not clean it thoroughly. Its feathers are puffed up and bit of sticky as those vomit always ended sticking to its feathers. Besides taking to the vet, do you have any idea what's going on with her and how I should help her? Thank you so much!