Soy is both almost exclusively GMO and is almost exclusively RoundUp Ready … just something I choose to avoid as much as possible 

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Owning or deriving benefit from the five grains (wheat, oats, spelt, barley, rye,) even whole, is problematic, as yeast fermentation may have begun already. (It must be kept super dry from the moment it was harvested.)Corn, Soybean Meal, Roasted Soybeans, Oats, Wheat, Barley, Milo, Peas, Lentils, Sunflower Seeds, Wheat Middlings, Alfalfa Meal, Calcium Carbonate, Oyster Shells, Grit, Dried Whey, Dried Mealworms, Cane Molasses, and about a gazillion supplements...
https://www.kalmbachfeeds.com/sites/default/files/specs/T1117.pdf
I do corn, sunflower seeds, oyster shell, fish-market waste, and table scraps. I also use deep mulch, and they get bugs out of there.Wondering what observant chicken keepers are doing this year-grubs certainly make putting together a diet with the right amount of protein easier. For me the idea of buying giant bags of corn, peas, fish meal I don't need seems wasteful. I might give chicks lots of leftovers and even some of the food we feed our dogs .
Only yeast grown on grain, or grain products, is a problem. Wild yeast from the air etc. is fine.Wine is bought kosher le pesach because it is par-boiled to avoid any wild yeast.
Matza tends to be too dry and I'd be concerned with constipation for anyone (both animals and people),
Even if one avoids the issue of owning grain on Passover, feeding any animal under one's care is still considered benefit, as it keeps one from needing to buy more of whatever else they eat.I find this interesting and I had no idea.
Could you deprive yourself of the benefit by just giving your eggs away for the 8 days?
I had to look up how long Passover lasted, btw.
That's what I meant by any animal. Dogs, cats, whatever. As long as a I own the animal and need to feed it, it may not be fed grain products, even by someone else, because it monetarily benefits the me to not have to feed my animal as much.I don't see how it is to your benefit if you are giving all the benefit away. What do you mean by "as it keeps one from needing to buy more of whatever else they eat"? Are you talking about the owner or the animal?
My chicken feeders only need to be topped off every 7 weeks. So it is easy enough for someone to not handle/actively feed the birds for that period.
What about pets that don't provide material benefit, just companionship? Do you have to adjust your dog's food?
Glad someone else answered the wine/beer thing. We will be giving eggs and all our table scraps. Our family personally is pretty traditional in that we do not eat many processed foods on passover and peel everything, so there will be lots of peels. We are also Ashkenazi, so we don't eat peas, corn, chickpeas, rice, green beans, any legumes, pnuts-but our animals can (don't ask, a lot of this is family tradition!)Question
Something just hit me are wine and beer allowed? Aren't they made with yeast? I would feed back their eggs, some meat and veggies.
Do they eat matzahs crackers?