My mare is going through this at the moment. It still hasn't been completely diagnosed as this but everything you have written is the process were going through atm. Random spells of diharrrea, low protein levels which he first thought was inflammatory bowel disease but after many test it isn't...
Can anyone help.. Start of dec my 5 year old mare had really bad diharea. She had a worm count done and blood test. Blood test came bac with low protein levels. The vet said possible Inflammatory bowel disease. He wormed her with pramox to be on the safe side of no worms, worm count was zero...