So it's ok if I plant lantanas in their run? Mine have been free-ranging for months around lantanas and have not gotten sick, but now doing research they are apparently toxic
Why even plant/waste space & energy planting something you already know is toxic???? There are so very many non-toxic and often beautiful alternatives, or just give them more clover, dandelions and plantains, along with lots of prettier flower options! (Mine insanely adore the tall wild lettuce that though uglyish, I can't grow nearly enough of.) Safe medicinals include chamomile, lemon balm, mint, echinacea, mullein, lemon grass, hops and others. Pennyroyal is TOXIC!
Privets & lupine are also reported as chicken toxic. And weedy privets are extremely hard/time-consuming to remove without toxic chemicals, so I've just cut them down and am constantly removing all their green parts that keep sprouting. Weeding out the toxics (horsetail, ivy & mallow) to make space for the healthy & delicious & SHADY is a big job.
I've added some safe shrubs & trees for shade, too in my NorCal Zone 9B summer drought & mild wet? winter mini chicken pasture. Willows, palm, hardy bananas, mulberry, pomegranate and moringas (attempting/will! protect with wire and straw before frost) transplanted grapes, pampas grass, rosemary, daylilies, lemon balm, lavender, salvias, blanket flowers & just put in a pole vine tunnel structure I just finally set up for A SHADY HIDEOUT with luffas, cukes/zukes/mini squashes/watermelons, butterfly pea for beautiful blue tea blooms, & chayote squash which are perennials (and keto friendly too!) I hope to add a couple of kewi next year. Along with bunches of standard kitchen herbs & fennels slightly removed, I'm also planting corn, sunflowers, wild strawberries, goji berries, hibiscus and ashwaganda, which although it is in the Solanaceae family, is completely non-toxic for chickens. I can't easily do blueberries without regularly amending our alkaline soil, but those are an extreme favorite, also. If I get everything in before summer's over, there won't be much space to even walk!
Now, if I could only stop the thorny blackberries being seeded everywhere from the wild birds! I planted 3 thornless varieties, but the wild are certainly more prolific fruiters all summer. It seems a high risk for bumblefoot, though I have not yet had that happen with my 8 lovely mixed heritage & hybrid 1 year old gals. (Knock on wood!) Berries in small amounts are the best fruits for ketogenesis, so I am still needing a raspberry (if only they were free like the wild blackberries?) I will have to tend them much better since they also are thorny.