Refill Chicken Waterers

What happens here

The farmer drives his Honda Pioneer UTV to the chicken pasture, noting the high water consumption of his 'pasture sanitation crew' chickens. He refills an empty chicken waterer (a bucket-style drinker) by removing the lid and pouring in fresh water from another bucket. He states that the waterers need to be refilled twice a day in the current heat. He also mentions the benefit of handling chickens (limiting their food and water slightly before approaching) to make them less skittish.

Goal: Ensure chickens have constant access to fresh water.