Alright, I have no idea what's going on with this bird! He gets sick around once every month or two and every time it happens it's overnight, I uncover the cage in the morning and he's there with a messy sticky face and throwing up. This time it happened about 3 days ago and he's fine now, good as new.
He lives in a large cage with two other budgies, one his brother and one his unrelated friend (they're all male), and he's the only one who ever has problems. They do not pick on each other, in fact they all have a personal bubble and don't tend to touch one another. I think he just has a bad immune system or something because he's the only one who ever gets sick, the other two are right as rain and I make sure of it! I immediately separate him from them both and put him in the sick cage away from the rest of my birds for a couple days (just incase it's infectious) giving him seed or gentle food like scrambled eggs plus some water with probiotics in it, and after about two days he's completely back to normal and wanting OUT of the sick cage to go back to his brother (they get stressed when separated but there's nothing I can do about it when they're sick, I don't want to risk passing anything around).
It's never from him eating anything out of the ordinary. In fact I didn't change anything this time, didn't give them any fresh veg/fruits or rice/pasta/eggs or anything, it was honestly just the regular seed they ALWAYS eat and never have a problem with but lo and behold there he was, throwing up SOMETHING. It looked like regular seed to me plus some slightly milky looking liquid. His droppings looked normal, maybe a TINY bit watery. I can't keep an eye on what might be making this happen to him because like I said, it's always overnight when I'm asleep. It never happens during the day or when I'm awake, oddly enough. Despite his throwing up he never seems lethargic or tired, he's extremely lively and making his regular budgie noises. You should see him running away from the towel as I go to separate him, he knows it's him I'm after!
The one time it was serious was after I fed him and the other two budgies cooked brown rice, he loved it and gobbled it up but it messed him up a bit, he was sick for about 4-5 days before he got better. I haven't fed them rice since, although it didn't effect the other two like this whatsoever, they were fine.
I'd take him to the vet but I honest to god can't afford to, I have no money in my bank account right now and don't expect there to be any for a long while. Does anyone know what might be going on with him, could it be serious or maybe he just has a bad immune system? Anyone with similar experiences? Should I keep putting probiotics in their water or can they build up an immunity to it's beneficial-ness?
Thanks so much in advance, I'm completely baffled over this..