Help Cheyenne Fight Her Illness

Most of you know me and my Cheyenne! I have asked for help before and I appreciate all that's help..I once again need help,Cheyenne is not well at all..My vet said they would like to scope her stomach and possible fecal testing. As you all know it's expensive! I have not recovered from Skye's vet bills and now Cheyenne! Any help you be greatly appreciated! I don't know what else I can do for Cheyenne, my heart is breaking Lost her brother not even a year ago and now I'm afraid I'm losing Cheyenne something is definitely wrong she's been so sick...No matter what meds my 2 vets have tried don't help her..She has bad acid reflux and I'm hoping they don't find anything bad for her..She's 10 years old and has seizures from time to time so to me this is scary to have done on her,but at this point I need a answer of what is wrong with her...Thank you again for your help and kind words,as I'm pretty worried