Just because it's herbal and natural doesn't mean it's harmless. Some of the most addictive and harmful drugs are natural. Opium. Cocaine. Cannabis (for birds anyway). Lots of natural poisons out there!
Oh they have calming agents. The most popular that I've been offered for my birds are Prozac and Haloperidol. The haloperidol in very tiny dosage helped my U2 FDB without making him sleepy or dopey. Haven't had the same luck with the grey. She immediately stopped eating. For a bird that is and always has been skinny that was a definte no go. Going to give it another try with a much smaller starting dose.
I've tried various herbal teas made especially for CAGs can't really say they helped
My friend that adopted my Goffins cockatoo had a problem with her plucking and the vet prescribed HALOPERIDOL. It's an antipsychotic used for schizophrenia in humans and in very low doses for senile dementia. Not sure it did much good for plucking but will definitely calm the bird.
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