Diarrhea again!! :(

Okay, I posted a month ago that my pregnant mustang was having Diarrhea/ soft poop problems. Well I have been dry lotting her during the day and letting her out at night. Well it got better for a little while but now it is back to really soft poop. Some one told me with all the new grass this is normal ( at least to some degree) but it seems they would get over it in a couple weeks!?
Sorry to bother y'all again but, I don't know what to think... :S
Thanks :)

Same thing happened to my horse a few weeks ago. It didn't seem to be grass related. It was only a one day thing with my horse, but it scared the heck out of me. Regardless of what's causing it, make sure to give her electrolytes in her water to help replenish fluids. Water alone cannot make up for dehydration caused by diarrhea. I never did figure out what caused it in my horse. Maybe some probiotics to help even her system out?

Thank you!! :) She is doing better now!