Each Lizard Doggo requires 4 foundations between pens to make taming them after a death efficient. With large numbers of Lizard Doggos, when dropping a berry surrounded by lots of Lizard Doggos there's no way to tell which Lizard Doggo ate the berry first. They only remain "tamable" for a limited time so you end up wasting a lot of berries when trying to tame them. At last count, 58 Lizard Doggos take about 30 minutes to retame.