Hi fabio; Not sure what your trying to do here... one cow breeding ?? should be interesting... (sorry, couldn't help myself) manure is best dealt with a shovel... start a
compost pile. Night pee ? never ever heard of anybody saving cow pee? What would you want it for ?? If you really want it, then a strong grate with a pan underneath would catch it

Or wait with a pail and catch it that way... (glad that is not me holding that pail ) If your concern is soiling the inside of your new stable well... its a stable... that is what animals in captivity do. See use a shovel above... give her a barnyard and she will go outside most of the time. When pee and poop are outside a tractor with a bucket does all the hard work for you. If you are wanting building plans for your stable, i'm sure a quick you tube search will find just what your looking for. As a side note... no animals do well alone... they need friends... another cow..(helps with breeding) a goat, horse , pigs, a lama ,even a dog if he will spend all his time with your cow. If you have an animal alone it will not be a happy cow and it will listen for other cows far down the road and it WILL escape ! Fixing fences is no fun and sometimes they can get cut up badly trying to get thru a fence. Buy 2 cows, build a barn for both ... maybe even some chickens or a few wiener piggy's . You will eat better, be healthier , stronger and ultimately happier. Good Luck with your new adventure !