Use interstate shape for logo.
Use the original INTERSTATE word in red at the top.
Under that, write "DAIRY LLC" in the same font as "INTERSTATE". 
Realistic picture of a holstein cow front and center or front and offset coming off the  sign shape,  with barn and silo in background. Or cow with baby calf.
 I would be interested in seeing the lower design in color as well as black and white.
 Included are some files of what I have I mind. 

I also would like  'est.1982' on the sign as well.

Thank you for designing the perfect logo for our farm. This was exactly what I had in mind!

Interstate Dairy LLC