You are called to a farm to see about a 3 day old Jersey cal…
You are called to a farm to see about a 3 day old Jersey calf that is lethargic, not nursing well, and has very watery yellow diarrhea. The owner said that the calf had not been able to get up to nurse since it was born. He tried to get her to nurse from a bottle, but said that the calf was not interested in suckling. On physical exam you find that the calf is very dehydrated and underweight. She has pale tacky mucus membranes, a CRT> 2 seconds, and a temperature of 102.5oF, heart rate of 96 bpm and labored breathing. Which of the following would be the mostly likely diagnosis?