Rabbits do not like rhubarb leaves because they're poisonous and fatal. Don't give any poisonous foods to your pet rabbit: they've lost their wild instincts and don't know what's good for them, and they can make themselves really sick.
Some sources say to avoid all parts of the rhubarb plant. Other sources say that rhubarb stalks (the same parts we eat) are okay for bunnies. There are so many safe foods that "better safe than sorry" probably applies.
Don't give your rabbit cooked rhubarb. Any vegetables and fruits you give your bunny should be fresh, not cooked.
If you do give your bunny rhubarb stalks, stick to the same rules as when you try any new food on your bunny: start with just a bite and gradually increase portion size over a week or two. Stick to only one new food at a time so that if the bunny gets sick, you know what caused it. Watch for signs of ill-health (e.g. diarrhoea, gas, no pooping) and be prepared to bring the bunny to a vet if necessary.
Rhubarb - if it's okay for bunnies - would be classified as a treat. Too many treats can make your rabbit sick, so they should be limited. The House Rabbit Society recommends no more than 2 tablespoons of treats per day for a normal, healthy 6 pound rabbit. Rabbit should mostly eat hay, pellets, and fresh leafy greens - other veggies and fruit are treats only.
See the related questions and links below for more details on the above info.
Rhubarb actually comes in several color varieties; from green to speckled pink to ruby red. It is safe to eat the stalks of green rhubarb, but never eat them if they have been frostbitten, and never ever eat the leaves of the rhubarb plant, as they are poisonous.
rhubarb is a plant that you can eat when it is cooked
Animals should not be encouraged to eat rhubarb
Rhubarb is the whole plant. You eat the stalks of the plant.
Any animal should not be encouraged to eat rhubarb
True possums (those found in Australia and nearby islands) do not eat rhubarb leaves.
tannins
That is the best time if it is ready to be harvested
No! Rhubarb contains oxalates, which can affect the digestive, nervous, and urinary systems.
Yes it is OK to eat the eggs....the poison of the rhubarb leaf is not transferred to the egg. The chicken will not eat many, it will get wise to the fact it is not good to eat rather quickly.
Yes, donkeys can eat rhubarb leaves, but it is not safe for them. Rhubarb leaves contain oxalic acid, which is toxic to many animals, including donkeys. Consuming these leaves can lead to serious health issues or even death. It's best to keep rhubarb leaves out of their diet.
Animals should not eat rhubarb, they will certainly need the attention of a vet. as soon as possible