I didn't know about that trend.
When our first 'local' (next town over.) In 'n Out Burger opened, I was glad to see the unseasoned burger patty being offered for pets. Especially pets like df's dog, who is on a low sodium diet. It allows her to give her treats for birthdays, or even when they are simply out together at the end of the day, and df wants to get dinner.
Love All Life, Thank You For Posting! :)