I have a 3 1/2 year old Registered Angus Bull, I have owned him for about 1 1/2 years, he was really doing well, been through all the normal preventive stuff, and gets wormed regularly with pour on. About 2-3 weeks ago, I noticed he doesn't seem to be as eager to eat at feeding time. he still grazes. He's starting to drop weight and when he is up at the barn is just stands there and shows no interest in eating. His head isn't all the way down but it is below his shoulders, doesn't show any other kinds of conditions of being sick, ie running nose, coughing etc. We gave him shot of pencilian and vit B last week, didn't seem to help. Were located in Florida have about 25 head. Thanks