Peanuts aren't really great for birds in general, so I would definitely stop giving him peanuts. Vomiting is not good, you should talk to your avian vet about that. My GCC will be 2 in November, and he doesn't really like peanuts anyway. Now I know not to give him any at all lol

I've had my boy Archimedes for two years, and I've recently found he's been throwing up his favourite treat! He's been in good health otherwise, and doesn't throw up when eating anything else. This is new, as he was able to eat them only a few months ago without problem. I haven't given him any more peanuts after he started throwing up, and he's been fine since. If anyone knows why he suddenly cannot eat them, I'd like to know why, and if I should avoid feeding him anything else.