I have a apprx, 30 to 45 day old Jersey calf who is sick. He won't eat, has no energy,gums are very pale,fecies is dark green,and intestines seem to be churning.Have given him a sub-q inj, of la200 24 hrs ago,some probios this morning,along with 1 scower tablet. would eat yesterday,but not today. Have given him as much electrolites as possible yesterday.What is wrong? and what else can i do ?

Optional Information:
Age: <1; Male; Breed: Jersey calf