please say a prayer for wolfie

Wolfie is sick, really sick. If there was ever a time that this horse needed his guardian angel its now. It's 3.30am and I'm at the stables doing hourly checks on wolfie. I arrived at the stables about 4pm yesterday. Wolfie was standing at the back of his stable looking very subdued and down. I went in and checked him over, couldn't find anything. I took his temperature, heart rate and respiratory rates all of which were normal. He didn't look physically sore he just looked exhausted and down. He came in at 9am yesterday and had eaten half a leaf of hay and passed one small dropping, not much of either. He wasn't dehydrated. I left him for half an hour, keeping an eye on him to see if he perked up. He didn't. I took his obs again, all of which were still normal. Wolfie is a vibrant, energetic horse, I have never seen him like this, not even when he had the schirrous chord. He looked like he had been sedated. I called the vet and explained the lack of symptoms, but how out of character this was. The vet arrived at 7pm and took his temperature, it was 106 degrees f by this point, dangerously high. He took bloods and gave him an antbiotic, painkiller and anti spasmodic injections. He got his hay taken away and is only to get warm treacle water till morning. The vet left with the instructions that he was to be monitored through the night. Any change or worsening and I was to call, if stays same, vet will come back in morning. About ten minutes after the vet left his heart rate went sky high and the sweat was pouring off him. Around ten minutes later his heart rate lowered an he stopped sweating. I've been trying to keep him warm and dry without him getting too hot. My thermatex has earned its keep tonight. It's worth its weight in gold that rug. His temperature had remained at 37.7 degrees c. He is brighter and looking for food. The vet thinks we are dealing with some sort of infection and are waiting to see if the blood tests show anything. I haven't even began to process this or how it has happened. He has no other symptoms than a seriously high temp and being down. Please cross your fingers for him as right now I am very scared.