Water and feeding - best practices - parasite control

Someone mentioned to me that due to the layout of my land (flat northern pasture, incline forest to south), it might be a good idea to have a giant pond on the flat land and use it as a base point for the animals to come back to at the end of the day. I was thinking of this recently and couldn't reach the guy for clarification to see if I am interpreting this correctly. Everything I've ever read says animals need water available at all times. So what's the stance on water availability? Water available all the time, or water available at the end of the day? Let's consider pigs, chickens, cows and goats here.. Obviously if it's Summer time and hot, pigs *need* a wallow, and access to water. But what if they tip it over mid-day and I get home at 7pm and fill it up, is this unhealthy for animals to go this long without? I've watched goats go all day without drinking hardly anything, but eating greens. Are there requirements different? It seems cows would need lots of water all day long.

Speaking of water, if pigs decide to bathe in it and then drink from it, aren't they contaminating it potentially with parasites? I have a big circular plastic bowl I use for feeding and the piglets like to step inside of it, should I be concerned about parasites and if so, is there a way to prevent them stepping inside of it?

If the flat spot is the highest point, which it sounds like, put a pond in with gravity feed water coming out of it. Either bury the pipe or do siphon. I have a small amount coming out of a spring fed hose going into a small, maybe 5 gallon rubbermaid trough. Overflow is for a wallow and if Ms Piggy knocks the hose out of the trough she can still drink from the hose.

Hi; yes piggies (all living things ) need access to clean water but even with clean water available they will still drink from their wallow rite after peeing in it ... ! darn piggies ! I have gravity water going to a rubber container that sits outside their fence I clipped a hole into the fence big enough for an adult pig to stick their head thru to access clean water , most of the runoff goes out into the field but some runs into their pen so they have a small wallow to lay in . When I have weiners I use stainless tie wire and make the hole in the fence smaller so they don't climb thru. In years past i allowed more water to come inside the pen making a big wallow but noticed that a lot more wallow water drinking was going on than i was comfortable with. Limiting the size of their wallow seems to have reduced the amount of pee water they are drinking. I always mix diatomaceous earth (2%)into their feed and have never any kind of parasite problems .

There isn't much of a wallow in the current paddock, but the prior one was great - no drinking out of this mud bath:

Nice! Looks comfy Will definitely stay on top of the DE, I've been using for everything