I just unlocked the Executioner Peep and definitely less than 50 feedings. This time around 20.
I just unlocked The Executioner Peep companion. It's probably my new favorite companion. It takes about 50 feedings to get this.
Here is also the cage.
I forgot to take a picture of the roaming peep, but it's pretty much the same.
So as it goes it takes 10 feedings for the cage, 20 feedings for the peep & 50 feedings for the companion. That's approximately around how many feedings it took to get those things for me.