I tried Avicalm when I first adopted my nervous CAG Scooter. Unfortunately, it wasn't helpful. Other parronts have reported good results with it though. It's available at many online sources and local pet stores that stock bird supplies.
For what purpose are you looking to use it?
How old is you aggressive caique?
You mentioned you also gave them a bath so it's kind of hard to say. Most birds get calm for a while after a bath at least until they start drying off and start flying around.
What do you mean by extra supplements? Did you already have some avicalm?
I think the owner of the company that produced avicalm also recently passed last year so I'm unsure if it's still being produced or people are just sell backstock.
I'm very skeptical of the product as it seems it works for some but make the condition worse for just as many birds. I imagine like with any supplement, certain "meds" just don't work too well depending on the person.
I'm not an expert.
Regardless, organic chamomile tea is safe for birds within moderation and much cheaper. I give some to Luna sometimes watered down occasionally.
i think the bath did help, i have not given them one for a few weeks.