I realize that Kevin. But observation ,over many years ,has lead me to believe that creep,/starter with 5 percent fat or more leads to more problems than it solves. Most people do not read, so continue on the same feed program ,long after 45 days. So now high fat content is detrimental to rumen function, and leads to other problems.
Many will disagree.Seen lots of lambs , with lots of digestive problems, get rid of the fat, and they will straighten out.
I should likely say veg fat. I expect most high quality feeds use some animal fats or some other than just soy and corn.