Passover dog food

What basic standards do I need to follow for pet food for Pesach?

No Chametz!

Hi, is this product ok for me to feed my birds with, on Pesach? Although I see various grains and seeds here, are they automatically chometz? When does a seed become chometz?:

Ingredients: white millet, oat groats, red millet, canary grass seed, ground corn, golden german millet,
heat-processed barley, flax seed, steam-rolled oats, safflower seed, corn gluten meal, dehulled soybean meal,
ground wheat, wheat middlings, calcium carbonate, canola seed, ground alfalfa, caraway seed, dehydrated
cranberries, niger seed, monocalcium phosphate, dicalcium phosphate, ground oat groats, ground flax seed,
vegetable oil, dehydrated alfalfa meal, salt, l-lysine, potassium chloride, dried egg, dried dandelion leaf,
dried peppermint leaf, dried raspberry leaf, choline chloride, yeast culture, magnesium oxide, vitamin a
supplement, dried lactobacillus acidophilus fermentation product, dried lactobacillus casei fermentation
product, dried enterococcus faecium fermentation product, dried bifidobacterium bifidum fermentation product,
dried aspergillus oryzae fermentation product, torula dried yeast, vitamin d3 supplement, vitamin e
supplement, fructooligosaccharide, yucca schidigera extract



I’m mostly concerned about the ground wheat. That sounds like flour to me. Now if they add water, that can be chametz. The kernels themselves not ground would be a problem to eat, but you can keep in your house and you can feed to the pets.

So all certified grain free dog food is ok for passover?