Odd Choice of Signage

I had to take a dog to the South Hills Animal Hospital the other day for work, and I haven't been inside there for a few years, so as I was taking in my surroundings, something jumped out at me. On their front-desk counter, there is one of those plastic signs with engraved letters. You would expect it to say something like "payment is due at the time of your appointment" or "cancellations require 24-hour notice" -- you know, something generic and office-like. No. Instead it says, in big, bold letters -- "GRAPES AND RAISINS CAN KILL YOUR DOG!"

Um...okay...

So can lighter fluid, but you don't have a sign posted about that. I know that grapes and raisins have been the "trendy" item lately for people to make you worry about, but to have an engraved sign about it posted at the vet hospital? It just seemed strange to me.