We have never free fed, but we do feed all three in separate bowls.
They are all in the kitchen at the same time, but in different locations.
We feed twice a day!
Camden eats a little bit slower, ( she used to be the fastest ), so I mix her food and put it down first. Then I go back and mix the bowls for the other two. That way she has a head start before the pig & thief start eating!