I have 6 Electric yellow labs...?...( could be hybrids with red zebra) and at feeding time they are fine until 90% of food is gone and then the Male will start chasing all the tankmates all over the place indiscriminately... (this lasts about an hour). And they all get along peacefully the rest of the day: (until next feeding.) The male is about 2.0 inches and the beta male 1.75 inches and the 4 females are 1.375 inches. What does this behavior indicate?