Follow our advice it is spot on. You don't want to mix it with calcium. Offer them seperately. those instructions are for reptiles and even then I would still offer separately. You see Horned frog grow very fast and need a lot of calcium. They absorb the calcium much faster and effectively when it is not mixed with the multivitamin. When mixed most of the vitamins and calcium will not be absorbed and pass right through their system fruitlessly.