Calcium required for growth (seven to thirty-seven weeks of age) is between 0.5 percent and 0.6 percent of the dry diet. The ratio between calcium and phosphorus is omportant and should be about 1.0 to 1.0. Abnormal ratios will result in improper bone growth, even with adequate Vitamin D (Figure VII).
Symptoms include rear leg stiffness and walking on pasterns. Joints swell and leg bones become bent and crooked. Later, head bones swell as do muzzle and guns. Teeth become loose in their sockets.
The usual cause is an all-meat diet which is low in calcium and high in phosporous.
With a balanced diet, this condition will not be seen. Analysis of feed can identify calcium and phosphorous levels if a special request for this is made.