Meat is very high in phosphorus.
Calcium deficiencies aren't obvious right away. Some of the signs are arthritis, skin and coat problems, digestive aliments, hyperactivity, aggresssion, lethargy, constipation, diarrhea, incontinence, kidney, bladder, liver, heart problems, splay-footed, and weak pasterns. By the time you see these signs, your animal is already calcium deficient.