If he is still eating, hit the snack isle and get a bag of pumpkin seeds, chop them up and give him a palm full (1/4 cup maybe?) 2-3 times a day for 2-3 days. I don't know with the other medicine if anything would react or negate, a cinnamon stick, 2 cardamom pods, and an 1/4 tsp of ground turmeric in a gallon of water works wonders. You can use the same but seep it in a pint of hot water, let it cool and force a few Tbsp down with a syringe a couple times, and water with the other. It's a good all around vitamin boost, anti viral, fungal, biotic, inflammatory, but I don't know if they would interact with the regular meds. Have ran it in the waterer for 2 weeks and side by side they prefer it to plain. Good luck, hope you save him.I am also running the tractor supply later to pick up some fish zole and vitamins for him