Something's Wron gwith the Healing Dan 3 Test

The first times I did the test, the bear always did about 70% damage to the chick on a 3 hitter melee. Which means 80% HP was the ideal rate.

Now after a few weeks attempts, the bear now normally do from 80 to 90% damage on the three hitter. They're not even criticals. I don't think the bear CAN do criticals.

What just happened? Did they ninjapatch this to make it harder or something? Because it's hard enough as it is already.