americanvalkyrie, we're glad our chooks have access to `high clover'. Though the range in May seems `painted' as `romantic pastoralist', it is anything but. The GSL at the far left had 4 stitches in her R flank from a Red Fox grab, two days before (down in the swale under those Bald Cypress). There is a Remington Nylon 66, leaning against another one of those scraggly Wild Plums, just out of the frame (we retired 18 Red Fox that year - `07). All but two of the chooks in that shot are still alive as nothing that eats poultry exits the property.
We have every sort of toxic annual/perennial cultivated in an ungulate rat filled `niche' (don't have to hunt deer - just walk out and beat them to death with an aluminum baseball bat). Vinca/Datura(s)/Wisteria/Salvias/Water Hemlock/Castor Beans/Holly/etc. My bonsai Poison Oak, in a bucket, hasn't been pulled out of the dirt - yet. Only injuries from plants have been mechanical. Roo landed on an Osage Orange thorn (right through foot) and developed Bumble Foot. Keep the Gooseberry/Multifloral Rose/Green brier cut back/Osage Orange/Honey Locust trunks cleared of thorns.
The chooks and turks ignore all the `deer proofing' (6 years and no `toxification' of the flocks). Other than the turkey hens glomming down Wild Chives until they stink of onions (if they'd eat a few bites of one of the sages along with it they'd reek of stuffing - then into the oven

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Both the turks and chooks are extremely wary of anything new (eat canned peaches, but growl at a whole one tossed in run). So, when Cass sat her Fuchsia Princess plants out on the back deck, for the summer, she figured the chooks would eat any bugs off of it and otherwise ignore it.

However, after a tentative bite by the roo, the chooks fell to it and ate several leaves/little stems, each (no flowers). How did they know this was not only safe, but tasty? Something like it etched in their Jungle Fowl hard wiring?
We'd never introduce an `unknown' to the flocks in an enclosed run (like humans - `man, I was just so bored I started shooting up...') as they might well poison themselves by `mindless' pecking. Out on the range they are pretty picky eaters, here.