Chili powder and /or cayenne powder down in the hole and on the bulbs will discourage
critters. Peat moss on top of plantings helps too.
Don't put the chili or cayenne on top as the critters can then get it in their eyes etc.
They just have to smell it. They don't like digging in peat.
Also planting daffodil or allium with the tulip bulbs helps as they eat tulip bulbs ,but not the daffodils or alliums.
