My start-up V-BLOOD a vampire themed energy drink received a Trademark Infringement Cease and Desist for using the word "Blood" as related to a vampire themed b

My start-up V-BLOOD a vampire themed energy drink received a Trademark Infringement Cease and Desist for using the word "Blood" as related to a vampire themed beverage. The other party was represented by McGuireWoods, a very large and prominent law firm. I sent a response letter challenging the Trademark, a few more letters were sent back and forth, resulting in my drafting a Cancellation of Trademark, then the other party backed down before I filed the same. (Note: I am an attorney, and the other party's TM "BLOOD" was registered but under the class of "vitamins/supplements" and not "beverages")