I made it!
After spending ages in Dalaran waiting for a Troll rogue to show up, I finally got my husband to create one on his account, and I ran over to Durotar to cover him in turkey feathers.
I was really pleased to complete this world event, as it rewarded me with another pet – the Plump Turkey 🙂 This was my 98th pet. I wonder when Blizzard will introduce an achievement for 100 pets. I’m nearly there!