I feel stupid, but the first 'puzzle' you encounter is the locked door and need to open it with a pet. How do you figure out which pet to use?

I know there is a guide for the dungeon somewhere but I can't find it right now, so here's a quick cheat sheet.

When you reach the door you will get one of four messages. Depending on which message you get you will need to pick a pet with a different ability:

- if the message says you can't figure out how to open the door you need a pet with high intelligence,
- if it says there is a suspicious switch above the door you need a pet with high agility,
- if it says the door won't budge you need a pet with high strength,
- I can't remember the other message, but it means you need a pet with high dexterity.

Thanks a lot! ^-^