Hi! My name is Kathie and I have a white fronted Amazon named Hollywood. He's been having sinus problems off and on for the last 4 years. Normally, it goes away after two weeks on medication, but since February it's constant. The different vets have come up with allergies because they can't find anything else. He's been through all kinds of testing and most recent was a blood test and culture which were normal. We've spent a large amount of money on him which is not a problem when it comes to Hollywood's health. I've given him all different types of medicine and nothing seems to be working. The latest vet prescribed Claritin for him and that just makes him sleepy and doesn't do much. Has anyone ever tried Collaidol Silver? I was wondering if that would work and how much to give him. He's weighs 183 grams. I'm at my wits end trying to figure this all out. Hollywood is definitely a mystery!