Re: Butterscotch and Naomi first post
There is a document about picky eaters in our file that you might want to read: https://ecir.groups.io/g/main/files/9b%20Pulling%20it%20Together/Picky%20Eaters%20Checklist.pdf as well as the basics on beet pulp: https://ecir.groups.io/g/main/files/5%20Core%20Diet/Beet%20Pulp/Beet%20Pulp%20Basics%20%E2%80%93%20How%20to%20use%20BP%20in%20Your%20Equine%E2%80%99s%20Ration.pdf
As Kirsten already noted Rice Bran can be problematic for many IR horses and since she's a breed that can be IR until you are able to get an insulin level on her I would err on the side of not feeding that nor letting her out on grass.
As far as feeding amounts - you have her listed as currently being 800lbs which would be FAT for a 12.3 pony. Looking at the pictures you shared they're not the best angle to judge, but she does not look THAT fat. If you don't have a weight tape could you perhaps use the calculator https ://ecir.groups.io/g/main/files/5%20Core%20Diet/Weights%20and%20Measures/How%20to%20Find%20Ideal%20Body%20Weight.pdf to determine her current weight? I would expect her to be about 550 - 600lbs at that height and to feed her accordingly you need to feed either 1.5% of her current weight or 2% of her ideal weight - whichever is more. IF she truly is 800lbs she should be eating no more than 16 pounds a day TOTAL (including hay and enough carrier to get her supplements in). You have her as eating somewhere between 12 - 18lbs of hay and a pound of dry beet pulp which is maybe more than she needs. Even erring on the high side she should be eating no more than 12lbs a day max if she really is 600lbs.
To administer Prascend, I'm a fan of syringing to make sure it all gets in the horse or pony, but you can use a the end of a carrot and core it out to hide the pill in it, a small piece of apple and stick the pill in it, a peanut shell or a pony pill pocket (not the molasses version) to get her to eat it.