I gave him 2 baby aspirin for his fever and put him in a stall with his mom and brother and turned the heat lamp on. I was going to give him a dose of pen.g but I dont know how much to give him....he weighs about 20-25 lbs. He had the runs a few days ago and I gave him sulmet and just finished the treatment. His temp is 106.2 he is acting off, not eating, laying around. Lungs sound clear, no rattling. What do I need to do?????