Tulip bulbs are cultivated in many enticing shades--but your pets should be dissuaded from tasting these bulbs. Tulip bulbs contain alkaloid chemicals called glycosides that can become caustic when ingested by dogs or cats. While glycosides are present in all parts of the tulip plant, most of these toxic compounds are contained in the bulb of the tulip. If your pet chews on tulip bulbs, stems, or leaves, contact your veterinarian. The best way to keep pets from chewing on tulips is to keep them away from the plants, and especially from the bulbs. Use fencing to separate curious pooches and kitties from your tulip plantings, and don't bring the dog along when you garden in your tulip beds. If you have a dig-happy puppy, prevent bulb excavation by covering the bulbs with chicken wire during planting.