sorry for your loss.
many years ago I had a budgy parrot who died and some liquid seeped from his mouth and nose. the vet told me he had some respiratory disease and his lungs/sacks had liquid. no bird can survive this condition. I am not sure what is the cause of death of your bird, this was...
I always give water with a syringe, small amount at a time. as I don't have feed for tube feeding where I live I simply open the beak and put some cracked corn and wheat then flush it out with some water. it gets messy but that way I saved 5 birds who didn't eat and drink at all. it is good to...
looks like some kind of infection to me. she probably does not eat enough and drinks a lot. I give baytril when I find poops like this - 1 drop/1kg of body weight for 3-5 days.