This critter could be eating one of my tulip bulbs, maybe even enough of them to ruin my meticulously planned Tulip Design of 2006 (alert the media.) But in 2005 every one of the tulips I planted came up, so I'll tempt fate here and say I found a fool-proof formula for squirrel deterrence. To wit: red pepper flakes - cheap and plentiful. I throw a few flakes into each hole just above the bulb before replacing the rest of the dirt. I see squirrels perusing the border but they don't even dig.
So squirrels, to you I say: HA!