As for your Med Kit, I would suggest a couple of things. Folks on here say activated charcoal capsules are excellent for pulling toxins out of the birds. That makes sense, as that's what ER's use. You can research on this site.
I have a natural home remedy, too. If it is a kind of toxin that's ingested, then you have to get it out if her/him asap. (Once, one of my girls ate either a bad wild mushroom or too darned many of them & was not doing well. She recovered after her 2nd day of 'potion' & gave me the stink eye for a while...just in case I had any funny ideas about giving her another dose!)
I've given this home remedy to numerous people, some of whom used it & some of whom didn't. It's always worked for me.
I use Bragg's brand Apple Cider Vinegar (ACV) in their water already, so there's always some on hand & they're somewhat familiar with the taste. Bragg's is all I use, as it's organic, unfiltered, unprocessed & has the most nutritious content.
In a short juice glass, add:
1 teaspoon Baking Soda (yep, Arm&Hammer)
1 teaspoon Apple Cider Vinegar
It's going to foam a lot & that's good, just wait until it settles & add
2 teaspoons tap water