Let's see... things that trigger my 14 pig squeak alarm:
1. Someone opening the front door,
2. A random noise outside,
3. Using the chopping board,
4. Standing in the kitchen,
5. Opening the fridge door,
6. Rustling ANYTHING or moving something,
7. Saying "Piggy, piggy, piggy Foooo-ooood?" when it's veg time (and do an impression of them squeaking when you say food),
8. Standing up after sitting down for a while,
9. Going up to their cages,
10. A rustly or chopping noise on the TV,
11. OH waking up (yes they watch him and squeak as soon as he moves),
12. Sometimes no reason is needed at all.
If you sneeze or cough or if there's a loud noise, they make a BBBR/ URRRP/ oinky noise
Cinnamon, Rasher and Caramel are my only pigs that chirp - usually around 4am.
If you get just the right spot on their backs, sometimes I get a purr or two lol
And wow, you're right, this is an old thread! Didn't even notice! :o