You would have a hard time with little guinea keets. They will stretch out their necks as far as they can reach while lying on their bellies with both legs flat out behind them. They will be sound asleep and for all intents and purposes look like they are dead right up until you startle them and they take off running at full speed.When I walk up to the cage and see that I freak out...thinking they are dying.
It scares me for a good 2 seconds.