I realized something while walking my dog the other day /sci./ My dog is spayed, which means she will never reproduce. More and more dogs are sterilized, except for a small reproductive minority. This means that eventually a small amount of dogs will be responsible for reproduction, with the rest being sterlile "workers" (i.e kept as pets.) In this model, it seems eusociality would be the better form of reproduction. This same principle somewhat applies to cattle, with one male and the rest sterilized, except the cows still reproduce.

We already have some eusocial mammals, but is the end of this the creation of a eusocial species of dog, of cattle?