Who did it?

This is Ferdinand. He is a 2,000 pound Roan bull. The laws of genetics tell us that the offspring he produces will probably be different, in color, than the other two bull's offspring. Using a Punnett square you can see the gene combinations, for color, that Ferdinand's offspring could have if he mates with a red cow. The color of Ferdinand's calves has to do with probability.

This is Rocky. He is a 2,200 pound Red bull. The color of Rocky's calves, if mated with a red cow, can also be determined by using a Punnett square. His offspring will also be unique in color compared to the other two bulls.

This is Rufus. He is a 1,920 pound White bull. The color of Rufus' calves can also be figured out, if he is mated with a red cow, by using a Punnett square. The color of his calves will also differ from the other two bulls offspring.