Wolf is very rare

Is it a known issue that Wolf is very rare? I have often played and got many more of all of the "Rare" towers than Wolves. It seems like it's deliberate (for balancing), but I just want to make sure.

It's honestly just luck of the draw. I've had games where the first dozen Rare cards I got were all Wolf. But it feels particularly rare when you're trying to draw them exclusively.

Exactly what Romeo said. You are just biased Form your expectations so it seems Mike the probabillity is not the same