Why

Yoghurt should be limited to the tiniest occasional lick, because like all dairy it contains lactose, and budgies lack the enzyme lactase needed to digest it properly. Plain, unsweetened natural yoghurt is the only kind worth considering, and even then only in a trace amount. Flavoured, sweetened or fruit yoghurts are unsuitable owing to their sugar and additives. There is no real dietary need for yoghurt in a budgie's diet, so while a small taste is unlikely to harm, many owners sensibly skip it altogether.

How to feed it

If you offer any, use only plain, natural, unsweetened yoghurt and let your budgie take the smallest lick from the tip of a clean spoon or your finger. Never choose flavoured, fruit or sweetened varieties. Do not mix it into other foods, and wipe away any residue quickly so it cannot spoil or stick to feathers.

How much & how often

No more than a tiny lick, the amount that clings to a fingertip, and only every week or two at most. Because dairy is poorly digested, keeping it minimal or leaving it out entirely is perfectly reasonable.