Have an existing ~ 1/4 acre pond on property in central Texas I bought 2 years ago. Due to drought, it is down to about 2' depth now. The water is kept muddy due to cattle drinking. At what point do the fish start to die? Haven't noticed any dead ones floating yet, but that could be due to birds, etc. eating them. Same problem is occurring in nearby creek hole, but on a narrower scale. There the concentration of water snakes visibly increases as the creek hole shrinks. The pond was stocked with bream, fathead minnows, and bass. Creek has same as well as mudcats and who knows what. I had thought I would see dead fish, but haven't so far.