Thanks for all the responses. Yes I know the nursing is more habit than need, the two problems I have is this: the colt's mama has dropped about one point on the body condition score in the last month. The filly's mama is due for backing asap and not sure how much still having a nursing foal distract her. The colt I doen't seem to search overly much for mama if she's not around. She was away the whole day yesterday working cattle on our other farm. He seems to miss her, but doesn't scream or call for her. The filly's never been seperated from mama yet, so not sure what's going to happen there.
Was thinking of keeping the foals in the stable paddock where I can keep an eye on them accompanied by my 20 year old gelding who have raised more foals than I can count and one of my mares. Still debating on whether to keep the filly's grandma with them or my Appy mare who likes the foals very much, to the point of sharing her food with them. Ther mares will be taken back to the veld camp where they came from, out of sight, unfortunately not out of earshot, but that might be hard, farm is only so big.
They will get lucern 2x a day, unfortunately the paddock doesn't have a lot of grazing, but will see what I can do.
The colt's mama is due for a float, My equine dentist is due end of the month so hopefully that will help some. She is not a "good doer" at the best of times and needs a float every three months or she drops weight like nobody's business. I'm scared she goes from a three to a two body score. So much more weight to get back onto her again later.