Tigger's Green Paw
Rhubarb

As with all plants, always check if you have any health problems that may be affected by consuming or growing any plants in your garden or yard.

Animal Safety: Dogs: No Cats: No Rabbits: No

Free Grazing: No
Lifespan: Perennial

Soil Type: Prefers fertile and well drained soil, but will grow in most soil types.

Life cycle:
Sow/plant crown: February to March
Harvest: From March or April (the following year)

About:
Rhubarb can be grown from seed, but is generally bought as a root crown that has been divided from an exiting plant.
Rhubarb is a common garden plant, usually harvested in mid-spring as the leaves expand.
Rhubarb was first imported from China as a medicinal plant. Until the 18th century, it was considered strictly a medicinal plant.  first by the Chinese and, later by the Greeks and Romans who all used the dried roots as a laxative.

Is rhubarb a fruit or a vegetable? Gardeners have long argued with cooks over that one! Botanically, it’s a vegetable, as we grow it for its edible foliage

Rhubarb is long-lived. It’s one of the most perennial of all vegetables.
Plants can live for 60 years or more.

Dogs, Cat and Rabbits
My research has been difficult to establish to what degree rhubarb is poisonous to animals.
It appears the leaves are quite toxic as they are with humans.
The stalk may not be or may be less poisonous to animals. Rhubarb poisoning in pets seems to be rare as the sour taste seems to naturally prevent most animals from eating it.

Eating enough rhubarb could make animals sick, so avoiding it would be the best thing to do.