Avoid List

DO NOT:
Avocado
Azeala
Blubous Plants
Bigwort
Bluebell
Buttercups
Clover(red)
Clematis
Cherry tree wood
Chocolate
Corn
Cowslip
Crocus
Daffodil
(Deadly) Nightshade
Dog's Mercury
Evergreens
Fool's Parsley
Foxglove
Grapes, not toxic in small amounts, and some people feed them, but they can cause adverse effects, especially red grapes, hence toxic to dogs.
Hemlock
Holly
Iceburg Lettuce
Ivy
Lemons and limes
Lettuce (causes tummy upsets, contains no nutritional benefit and can cause diarrhoea)
Meat
Milkweed
Mistletoe
Onions
Peas
Peach leaves and wood
Plum leaves and wood
Poppy
Potato
Primrose
Ragwort
Raw Potato and potato leaves
Raisins
Red Clover
Rhododendron
Rhubarb including leaves and stalk
Shelled nuts or seeds
Snowdrops
Tomato leaves
Woodsorrel
Yew
Anything else you are unsure about - If In Doubt, Leave It Out!