Energy and weight gain! Wonderful progress Breny. Im so happy along with you. Go Tia go!
Im sorry the foods I recommended didnt help her appetite. She is a real survivor, so she may just not want to eat that canned or gooey stuff. If it is making her cough and gag then she just cant handle it. It most likely affects her breathing and gets in the nasal passage.
She probably can not tolerate the semi solid food and probably will have to just go directly to dry food and water only.
Is she licking the formula more on her own yet? Have you tried repositioning the formula yet (such as she comfortably feeds with you)? A Water bottle maybe?........................This is just a thought.
No I havent always raised yorkies. Just about 3 yrs now. Always a learning experience, always a work of art. You could spend a life time trying to learn all of it and still not know it all. I just love what I do. (most days....

)
But I am no stranger to animals. I have always had a special love for dogs and horses.
I could write a book about my experiences with animals in general! I just love them.
But I raise only yorkies and have one rescued 25 yr old mare who entertains my kids with great horseback rides in our pasture..