Pond is 2yrs old, 3/4 acre, 22-25 ft deep in the middle and very cold. Then shallows out. Ton of habitat and fhm. Put 20, 12-14 inch rainbow trout from a fish farm in during April. Sitting on the dock today feeding the minnows and look down to see a 12 in rainbow just hovering in a ft of water. He was not interested in eating as the minnows were all around him. He would swim off, but then come back again. Didn't look sick but we have never even seen one let alone one hanging out in a ft of water. Any ideas?