Thesis by publication. Chapter 2B is an accepted manuscript. Permitted provided set statement, publication details, and link to published version included. ttp://sherpa.ac.uk/romeo/issn/1040-8398/ Page inserted with details. Chapter 2C - not permitted. Article replaced with citation details https://authorservices.wiley.com/author-resources/Journal-Authors/Promotion/article-sharing-policy.html Removed & page inserted with citation Chapter 4 - permitted https://www.springer.com/gp/rights-permissions/obtaining-permissions/882 Page inserted with required statement Chapter 5-6 are articles made available through Elsevier https://www.elsevier.com/journals/journal-of-dairy-science/0022-0302/guide-for-authors, https://www.elsevier.com/about/policies/copyright/permissions Permitted in thesis. Chapter 3, 7, 8 are published Elsevier articles. Elsevier has a policy of allowing published articles to remain in theses. https://www.elsevier.com/about/policies/copyright/permissions (click on Can I include/use my article in my thesis/dissertation). Signature on PDF removed and full-text attachment replaced. LM 10/07/20