This is a Belgian Blue Bull. Weighing up to 1300 kg. Often referred to as double muscled bulls. It’s a result of a crossbreeding project that dates back to the 50’is. It’s not a bull on steroids or any other conspiracies about how they got so big.
Imagine the difference in the size and weight of the cow. The weight of a normal bull can make a cows back legs give way and make them do the splits. It’s not exactly humane. Imagine the damage the weight of that monster would do and the size of the calves