When the block stays untouched
A grey that refuses cuttlebone and mineral blocks is not necessarily short on calcium, but grey parrots have a well-known need for steady calcium and vitamin D support, so an untouched block should never be your only plan. The block only helps if beak meets it. Once a bird decides that white chunk on the cage bars is furniture, weeks can pass with almost nothing taken from it, while the shavings on the floor create the comforting illusion that something was eaten. Your job is to shift calcium into routes this particular grey already trusts: food it chooses, in textures it likes, measured by what disappears rather than what was offered.
Hide calcium inside accepted foods
Start with the cuttlebone itself, just in a form the bird cannot ignore. Scrape or grate it to a fine powder and stir a light dusting through warm chop, mashed sweet potato, or a small portion of cooked egg food, so each bite carries some with it. Rotate calcium-rich fresh foods through the week: kale, bok choy, dandelion greens, broccoli florets and turnip greens all contribute, and a formulated pellet as the dietary base supplies balanced calcium alongside other nutrients in every mouthful. Offer one change at a time for several days so you can see which vehicle this grey reliably finishes, instead of presenting five new bowls it can reject at once.
Light, weight and the bigger picture
Calcium use depends on more than intake alone. A grey kept indoors without access to unfiltered sunlight or appropriate full-spectrum lighting may not process dietary calcium as effectively, so review your lighting setup alongside the menu. Weigh the bird weekly on a gram scale at the same time of morning and keep the numbers; a downward drift matters more than a single day of pickiness. Note beak and nail condition too: soft, flaky or overgrown tissue, weakness, tremors or a sudden drop in coordination are not problems to solve with extra powder at home, and they warrant a prompt call to an avian vet, who can judge whether bloodwork is needed for this bird.
A daily tracking habit that catches gaps
For the first fortnight, write down exactly which calcium source was offered, in what form, and how much was actually eaten by evening. Patterns appear quickly: many greys accept grated cuttlebone in morning chop but ignore greens after midday, or eat broccoli only when it is clipped whole to the bars to shred. Use that pattern, not hope, to build the standing routine, and re-check it monthly because a grey's grudges against foods shift. If intake stays patchy across several different vehicles, or the bird is a laying hen, raise it with your avian vet rather than stacking more supplements on your own.
Rotate the green you clip to the bars every few days as well, because a grey that ignores loose kale in a bowl will often work enthusiastically at a whole leaf it can pin down and tear, and that tearing is intake you can see and count.
Closing the loop for everyone who feeds your grey
Put the accepted calcium foods, the grating method and the weekly weigh-in on your grey's shared routine in KinsLe using Care Teams, so a partner or sitter serves the version the bird actually eats and marks each feeding complete.