Explain the answer to the question in detail:
 
Read the text carefully and answer the questions:
 
Ramesh is a dairy farmer who wants to increase milk production in his cows. He notices that some cows have low milk yield and appear unhealthy. Upon inspection, he finds lice and mites on the skin of some cows and discovers that a few cows have worms in their stomachs.

The cattle shed is old, poorly ventilated, and waterlogged in parts. He decides to improve the feed and the hygiene of the farm to enhance the health and productivity of his cattle.
 
i. Which of the following measures should Ramesh take to control external parasites in cattle?
 
ii. To improve milk production, which feed strategy is most suitable?