Moles are not the things that are mubching on the tulip bulbs, voles (Field Mice) are. Some people with this problem plant the bulbs in fine mesh cages that will keep the voles away (1/2 to 1/4 inch hardware cloth), or plant the bulbs with sharp crushed stone around the planting bed. The peppeers may be somwewhat effective until they absorb moisture from the soil and loose that pepperishness.

as usual kimmser, you are on it.