2 mo. old baby holstein calf getting sick? Not sure whats wrong. Rib cage/Abdomen looks swollen. HELP!!!!!?

2 months old calf, has been bottle feed, also eats calf manna and ween pellets, just looks swollen around rib cage and not finishing his milk during feedings(not normal at all for him). Concerend what could be going on. He also appeared to be having trouble with his bowel movement this morning. Please if there is anyone that knows what may be occuring, HELP
What could be going on with my calf? His rib cage looks a bit swollen(almost like he is taking a breath) Not eating as good as normal and a little concerned that he is not having a bowel movement well. Bottle fed and on calf manna and ween pellets