It would be wise to consult your state's list of noxious weeds/ prohibited plants. This could prevent a few headaches. Some thistle species are incredibly invasive and very hard to control, and in many instances impossible to remove.
When you drive/walk around the area, do you see this plant being aggressive or dominating?
I find that goldfinches will actively harvest everything from dandelion heads to sunflowers, which they are crazy about. Nobody blinks an eye at these habitat plants. And they feed your pollinators too. My 2c.
Dear Wife makes burger patties that are sort of like a meatloaf -- mixing in a bit of big flake oatmeal, finely minced onion, and a ketchup/mustard BBQ-ish-sauce. (That's what I recall offhand.) They stay gorgeously moist and hardly shrink.
I find that urine is a small but useful component of my soil building process. I don't apply it directly to soil or garden, but I will apply it on the dripline of established trees. In any case, the dilution factor is huge and the results speak for themselves. I agree that caution is reasonable, but I would never say never.
