My roo has been lethargic for about 3 days. Had bubbles on his eye yesterday but gone today. No signs of trauma, lice, mites etc. He seems somewhat interested in food when I put it in front of him but the crop is never getting close to full. I'm sure he's lost weight. Opens and closes his beak as if he's eating peanut butter but seems to be breathing ok. He is isolated with heat and water with electrolytes. I have ivermectin and tetracycline on hand but I don't know which way to go. Any ideas?