Happy Birthday Cards and Rhinoceroses

I made this birthday card for my friend, Andy, today as my creative gesture.
I've been creating my own greeting cards for several years now under my "logo".

Andy collects rhinoceroses and this is probably the best artistic rendering of the rhinoceros ever created.  I felt the image made an appropriate birthday card created just for him.

I found the clever quote regarding birthdays online but added the part about the hide, etc.

As a college art student back in the 80's I had to copy the work of a master, so I chose this piece by Albrecht Durer  The detail was quite a challenge.

My drawing hung in my brother's office for many years.  I wonder where it is now?