I just wanted to welcome you to Yorkie Talk and say how sorry I am to hear about your Pepe's recent diagnosis.
I googled the diagnosis and found this site explaining some information on the disease. Otherwise, I don't have any experience of my own to help you out with this.
I hope that Pepe responds well to treatment and remains stable for a long, long time to come.
Protein Losing Enteropathy in Dogs & Cats / Dogs Articles / Pet Articles / Televets.com