How to stop manure losing N till compost time?

I'm hoping to try to build a pile for thermal composting 3 days from now. I've got cow manure all over the pasture from dry, to semi dry, and from semi fresh, to very fresh. While I'm building up my other ingredients, watering my dry hay, etc.. What do I do, or how do I store the fresh cow manure?

I would store it in covered five gallon buckets fill them as full as you can then pop the lid on so air doesn't get to the manure.