Iodine supplement for cockatiels

A vet-confirmed iodine deficiency in an 8-year-old cockatiel is worth taking seriously — low iodine is directly linked to thyroid hyperplasia (sometimes called goitre) in cockatiels, and it's more common than most owners realise, particularly in birds on seed-heavy diets. The good news is it's very correctable with the right supplementation. Before I point you to the most appropriate product, can I ask: is your cockatiel mostly on seeds, or does he have pellets and fresh food in the mix too? And did the vet express a preference between an iodine block or a liquid/powder supplement?

That's really helpful. With a seed-dominant diet, an iodine block actually makes a lot of practical sense — it's always available in the cage, he can use it at will, and there's no risk of over-supplementing the way there can be with liquid drops added to water. For an 8-year-old cockatiel, I'd recommend the Versele-Laga Iodine Block. It's widely trusted among avian vets and bird keepers in the UK, sized appropriately for smaller parrots and cockatiels, and it attaches easily to cage bars. It provides a steady, safe level of iodine without any fuss. Keep it in the cage permanently and let him nibble as he chooses — most birds self-regulate well with blocks.

It's a fair concern, but iodine blocks are specifically formulated at concentrations that make over-consumption very unlikely — cockatiels tend to use them in small amounts, and the block format is far safer in that regard than drops added to water, where the dose depends on how much the bird drinks. The Versele-Laga block has a long track record with cockatiels precisely because the dosage is passive and self-limiting. If your vet wants to recheck iodine levels in a few months, that's a sensible way to confirm it's working — but toxicity from a standard iodine block in a healthy cockatiel would be exceptional.

For addressing a diagnosed deficiency, the block alone is typically enough to do the job — you don't need to double up. Kelp powder as a food supplement is more commonly used as a preventive measure in birds already on a varied diet. Given that your cockatiel is seed-heavy, putting energy into gradually converting him toward pellets will do more long-term good than adding kelp on top of the block. The block handles the iodine; improving diet variety handles the broader nutritional gaps. One thing at a time, and the block is the right first step.