one of the puppies still had problems by the autumn and was prescribed a penicillin (flagyl) cure of 3 weeks, a period of “health” for 2 weeks, followed by a repeat of this procedure.

This is all lower case. Can you fix that?
One of the puppies still had problems by the autumn and was prescribed a penicillin (Flagyl) cure of 3 weeks, a period of “health” for 2 weeks, followed by a repeat of this procedure.