Kenny, until she is tested, just be sure to feed a low potassium diet. Senior's feed is low. I had inquired to various feed companies prior to acquiring and N/H. If you google foods for hyperkalemia, it lists from high to low foods with potassium. Carrots, apples and bananas are right up there, so for now avoid feeding these as treats. Any horse whether HH or N/H should be out on pasture as plenty of movement is doubly important for them. It is best to offer loose salt, pickling salt with a little iodized. Horses ingest much more loose salt than from a lick which creates a sore tongue.