Assuming that Loretta doesn’t straight up torture Lady Bell to death, to my mind, there’s only two things potentially worse being milkbagged - litter pal and breeder mare.
Everybody knows what a litterpal is, but that’s a bit of a waste of her genetics.
With a breeder mare setup for those unfamiliar, it’s much like the industrial foal-in-a-can configuration, but with a few modifications. She’ll get pillowed, de-tongued then mounted into a rack with her crotchtits dangling down into a little pen. The rack will usually have a littertray behind her, but with a detachable ramp so that stallions can walk up and mount her when required.
Her foals will be dumped into the pen, so they can feed whenever they need to without her interference.
She’ll have a hamster-style water and liquid feed bottles within reach, so Loretta will only need to fill those up every now and again and change the litter tray for daily upkeep.
Nekuchan did a couple of comics featuring this setup: Fluffy Business and Huggies save lifes (sic).