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.