This is by no means an extensive list but it is good to be aware.

look at the photo, you will see a list of plants that are either OK, Toxic or downright poisonous! Some of these are a surprise! Daffodils are everywhere, and very beautiful but poisonous. Additionally Conkers, Acorns, Any Spring bulbs. The nightmare before xmas!! Holly, Ivy, Christmas trees and this lot:
- Aconitum
- Amaryllis bulbs
- Asparagus fern
- Azalea
- Bluebells
- Cyclamen
- Daffodil bulbs
- Day lilies
- Delphiniums
- Dog's Mercury (Mercurialis perennis)
- Foxgloves
- Hemlock
- Hyacinth
- Hydrangea
- Ivy
- Laburnum
- Lily of the valley
- Lupins
- Morning glory
- Nightshade
- Oleander
- Rhododendron
- Rhubarb leaves
- Sweet pea
- Tulip bulbs
- Umbrella plant
- Wisteria
- Yew
Without wishing to terrify you dogs are not generally attracted to these plants but cautionary advise is always if in doubt PHONE THE VET!