Can cockatiels eat cabbage?

Yes — safe in normal portions

Yes. Cabbage is safe for cockatiels as one of several vegetables. Darker leaves offer more nutrients than the pale heart.

Portion: About a tablespoon (15 ml) of finely shredded leaf as part of the day's vegetables
How often: A few times a week, rotated with other vegetables
Sugar: 3.2 g / 100 g

How to serve it

Wash the leaves
Pick darker outer leaves where possible
Shred or chop finely
Take away leftovers after a couple of hours

Why

Risks. Like other cabbage-family plants it contains goitrogens, which can interfere with iodine use if fed in very large amounts, so rotate it rather than feeding it every day.

Benefits. Cabbage gives crunch, fiber and variety, and VCA lists it among suitable vegetables for pet birds.

Questions owners ask 1

Is red cabbage okay for cockatiels?

Yes. Red and green cabbage are both fine in moderate amounts; red cabbage may temporarily tint droppings.

Cabbage: nutrition per 100 g

Water	92.2 g
Energy	25 kcal
Sugars	3.2 g
Fat	0.1 g
Protein	1.3 g
Fibre	2.5 g
Calcium	40 mg
Phosphorus	26 mg
Calcium : phosphorus	1.54 : 1
Sodium	18 mg
Vitamin A (RAE)	5 µg
Vitamin C	36.6 mg

“Cabbage, raw”, USDA FoodData Central (SR Legacy, FDC 169975). Public domain.

Sources & method 3

The sources below discuss cabbage for cockatiels (or for pet birds generally). Confidence: medium. Rated on the JOMIZOO Feeding Scale; when good sources disagree we choose the more cautious level.