My feelings exactly. I usually sell any extra eggs for $3 but some say I should charge 4 and some of them have given the extra dollar.
Those that can't discern the difference in taste just don't care.
I agree with matt. It's mostly the same.
What I would do is compare the guaranteed analysis and ingredient list on the feed bag tags. That will answer most of your questions.
IMHO, animal protein is superior to vegetable sources for omnivores. I don't remember there being animal protein in the...
Definitely go with the big bags for the cost savings.
I never fed Nutrena but did feed Dumor for a long time with no complaints. It's made in the same mills as Purina. I think the mill is Great Lakes.