To add to my question. Would milk have been more of a seasonal resource with cheese being used through the periods milk was unavailable ( when I presume livestock wasn’t lactating as they were not actively feeding young or pregnant) ?

Though none directly answer the question you asked, you may be interested to check out these previous r/askhistorians threads while you're waiting for an answer!

/u/wotan_weevil talks about some of the differences in milk production between modern and traditional cow breeds in How much milk would an ancient milking cow produce compared to a modern cow? Is there any data or information regarding historical dairy production compared to modern production? How different would an ancient dairy cow be physically and in terms of production compared to a modern cow?

/u/BRIStoneman linked to a really cool study in their comment on When did humans start drinking cows milk?

Let’s say I’m a Swede during the viking age who just inherited a piece of land. What crops will I plant to harvest and feed my family with? What meals will I make with those crops? What animals would I raise? is a little broader, but /u/vonadler gives a very informative answer.

Why is there butter in bogs? is answered in great detail by /u/gothwalk, who also wrote the amazing post Monday Methods: Food History, and How We Know Things.