Thank you for your feedback. Yeah the scaling of the boss sprites is a bit wonky, it can be hard to tell where their center actually is. I will look into it in future updates!
This wasn't really a center issue though. Literally the top pixel of the wolf's visuals hit the bottom pixel of my tower and it got oneshot. I've never had that happen when the wolf comes from the top of the screen, it's only happened that one time when it came from below.
Edit: Exact same thing happened again. Wolf is still touching the bottom of the screen. The top of it had barely gotten to my spikes, let alone my turret, when I just instantly died.