Why the change has to be gradual
A green iguana is a strict herbivore built to run on leaves, and the unsuitable diets they arrive on usually fail in one of two directions: animal protein — pet food, egg, meat or insects — or a pale regime of iceberg lettuce and fruit. Both do quiet damage over time, the protein straining kidneys that never evolved to process it, the lettuce diet starving the skeleton of calcium. An iguana that has eaten that way for years will typically walk away from a sudden bowl of pure greens. Gradual is not indulgence; it is the only version of the change that gets eaten.
The ratio method, step by step
Blend rather than swap. In the first stage, the old food still makes up most of the bowl, but a solid share of chopped greens is mixed through it. Every few days — roughly weekly steps suit most animals — shift the balance: old food and greens in equal parts, then greens dominant with the old food as a minority, then greens alone and the old diet gone. Two mechanics make this work. Chop everything, old and new, to a similar small size, and toss it thoroughly, so the iguana cannot perform surgery on the bowl and extract only the familiar bits. Sprinkle the salad lightly with calcium powder throughout, because the weeks of change are exactly when a calcium-poor history needs correcting. Serve the bowl fresh each morning and remove what is left at day's end.
What "proper greens" actually means on the plate
The base of the finished diet is the calcium-rich staple leaves: collard greens, turnip greens, mustard greens and dandelion, with escarole in the rotation. Around that base, the body of the bowl comes from vegetables like butternut or acorn squash, green beans, parsnip and snap peas. Fruit is demoted to a garnish — a little papaya, mango or a berry as the cherry on top of the bowl, never the bowl. Be wary of building the mix on spinach- or chard-heavy blends; those leaves carry oxalates that bind calcium, and while they are harmless as occasional guests, the transition is about installing better defaults. Mist the salad lightly so it glistens, and keep drinking water available — a hydrated iguana eats greens far more willingly.
Warmth, light and the stubborn days
Appetite in an iguana is temperature wearing a disguise. Serve the bowl once the animal has had time to warm up under its basking spot, and make sure the enclosure provides proper basking heat and UVB light; a cool, dim iguana will not eat greens however well the transition is staged. Expect stubborn days in the middle stages — a healthy adult can miss a day without harm, and the answer is to hold the ratio and offer fresh again tomorrow, not to cave and refill the bowl with the old protein, which is the one backslide that matters for the kidneys. Track weight casually across the weeks and let the trend, not any single day, judge the plan.
The vet baseline for a rehomed iguana
An animal arriving with a poor diet history deserves one early appointment with a vet who treats reptiles, transition or no transition: a baseline check gives professional eyes on the kidneys, bones and body condition you have inherited. Trembling, a soft or rubbery jaw, swollen limbs or a lethargy that lasts are not stubbornness to wait out — those are prompt-appointment signs. Booked early and fed steadily, most rehomed iguanas settle onto greens within a matter of weeks.
Because KinsLe's Transferrable Profiles move an iguana's history and routines to the new owner intact, the previous diet, the ratio stage reached and the greens that finally worked stay on record after the handover conversations end.