Xeon

Here is a log from an NPC in Dragonbone:

[Normal] 18:08 - [PetBattle] Revive Battle Pets spell not ready, wait
[Normal] 18:08 - Go to vendor
[Navigator] 18:08 - Path Count: 10
[Normal] 18:08 - Mounting gound mount Obsidian Nightwing
[Normal] 18:08 - Vendor named Risera
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Go to vendor
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Vendor named Risera
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Go to vendor
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Vendor named Risera
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Go to vendor
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Vendor named Risera
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Go to vendor
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Vendor named Risera
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Go to vendor
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Vendor named Risera
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Go to vendor
[Navigator] 18:08 - Path Count: 2
[Normal] 18:08 - Vendor named Risera
[Navigator] 18:08 - Path Count: 2

This one it would open up the "Lost pets" option instead of the heal pets.

Do you depend on the dialog boxes being at a certain location on the screen?  Because I've moved mine around.

yes, either stunned, sleeping or trapped, so it can not make any moves. All attack keys (1-3) will be greyed out and onlt option is to Pass or swap to another pet.

Cool, thanks!

I had the same issue on another NPC as well (the one at Halfhill in pandaria)

Log data:

[Normal] 20:33 - Go to vendor
[Navigator] 20:33 - Path Count: 40
[Normal] 20:33 - Mounting gound mount Obsidian Nightwing
[Normal] 20:34 - Vendor named Kennen
[Navigator] 20:34 - Path Count: 2
[Normal] 20:34 - [PetBattle] Revive Battle Pets spell not ready, wait
[Normal] 20:34 - Go to vendor
[Navigator] 20:34 - Path Count: 2
[Normal] 20:34 - Vendor named Kennen
[Navigator] 20:34 - Path Count: 2