Most of my silage ground is miles away. At least you think it's a nice idea. Only works here as my best ground is near the parlour and I have a small herd. I feel it's my best option here but no two farms the same. Most years I don't sow nitrogen before the cows go out to help keep them on top of the grass. Normally I keep young stock in till the night's warm up abit. The sun doesn't always shine up here either!I take it then you can access your whole farm with milk cows? If so, you'd be thoroughly unique in my locality.
On the soils here, cows are generally the last thing we want on the land at the shoulders of the year, and during wet spells. Spread them thinly if you like, but the foot still goes in four inches and the hole still fills with water.
It's a nice idea, but there are practical reasons why its not a reliable strategy on this farm.