Never Feed (but not poisonous)
The leek vegetable has a mild, sweet onion-like flavor and the base is firm and crunchy. The leek plant is related to the same vegetable family as onion, garlic, shallots, and scallions. These are all called Allium vegetables.
For Your Pet
Avoid feeding your rabbit vegetables from the onion family. If your small pet eats plants like leeks, onions, and chives, this can cause blood abnormalities.
Although leeks are not poisonous, you should never feed them to your pet.
For more information about what not to feed your bun, click here.