Have a 5-week old Jumbo Cornish Rock that is lethargic, won't stand up, has watery poop smells more like urine. Just started behavior today and is the only one of 13 Rocks so far. Quarantined it. Feathers are ruffled, wet near vent area. Drank a little water with vitamins and electrolytes and ate some feed, but seems to have stopped both. No mouth or nose discharges. It's cheep, cheep is very weak with possible wheeze. Otherwise breathing normal. No clue as to issue from research
