I watch the manure everyday, every time I am out with them. They all 3 seem to use the same spot in the pen I have them in. Peebie just goes wherever, whenever... but the other 3 have their own spots they go in, so it's easy for me to see who is doing what.Congrats on your new little family! You have gotten some wonderful advise here. I just wanted to add;
It is a good idea the check all manure piles daily. You want to make sure they are not too dry, not too runny. You want to make sure there are enough of them. Healthy horses will generally make you a pile shortly after they eat. There should be a few piles per horse per day. If you find that someone is not passing manure You may be looking at a future colic. If a horse has not passed manure in 24 hours you have a big problem. You will need to call the vet.
You will also want some psylium on hand. About once a month, you should give them psyllium for 5 days. This will help keep sand out. You can use sand clear. You give it by weight so it is not much at a time.
Keep a close eye on you little colt that coliced. How is his manue looking? It may have been gas colic because of switching the diet.
Banner had very much changed his diet when he came here. He had only ever grazed until he came here, the guy never even went near him, it would seem and when it did, it wasn't a good thing. He never wanted him, he wanted his mom and he came with the package. But he is doing wonderful now.