This is not unusual. The incidence of cow's milk allergy ranges from 0.3 to 7.5 percent among infants. Allergy to soy is seen in 0.5 percent or less of this population. I will check with experts at Ross Laboratories about satisfatory alternatives and g et back to you soon. In the meantime, calcium-fortified orange juice has almost 300 mg calcium in an 8 oz. glass.
Some cereals are also fortified.