Board Game Arena

Nevermind. After everyone fed their carnivores it popped up with an option to feed 2 goats to my mutants. All I had to do was click an available spot to put the new mutant.

How do you spawn the mutant in the grid? I see the goat over my other carnivore, but I don't see a button that let's me feed the mutant or to place a mutant in the grid.