Probably the rooster.
Cocks.
GRrrrrrrrrrrrrrrrr
A dog,..!!
cockrals maybe
I think people just naturally woke up at the same time each day. If you get up at 6.30 everyday then you'll wake up at 6.30 if you forget to set the alarm because your body clock adjusts itself to wake up at that time.
dogs.
in close second, because they kept the rats and bugs away from your house: cats.
-blurey
The laser detection pig.
Had to have been a rooster.
Horses have been used for years to let their owners know when strangers approached.
Besides dogs, roosters and cats, I would say try sneaking up on a pig, you wont forget
geese
- The London Tower used geese to warn the Wardens of intruders. (Geese are pretty loud)
- Dogs where used (and still are) because they Territorial.
- Horses have a good sense and sense strangers.
BTW: Roosters where never used to my knowlage
Peacocks are excellent alarm animals, and have been used in that role for centuries. I have farmer friends who still use them specifically for that purpose. An added bonus - they're beautiful.