Do not add Calcium - there should be all he needs in his food. A bit of cottage cheese should do no harm, if he can tolerate it - it might give him the runs.
Give him lots of chew toys and knuckle bones - the exercise of chewing should help his ears, but there is no need to worry about his ears at this age - give them time to come up on their own. Plus, when he starts teething, his ears may be up and down, so don't worry.
BH, OB1, TR1, AD
Rottweiler/Hairy Dog mix?? Shelter rescue
Gryffon Vom Wildhaus