I know that this is an older post but I'm hoping I can get some info here. I spent hours and hours researching lab block and finally went with Sand Valley. After researching I felt comfortable that since it was manufactured by Harlan and identical that it was the best food for me, especially at the price I was paying ($18 for 40). I had tried Mazuri but it made my mice poop a ton and they really smelled.
Well I got my most recent order of Sand Valley (400 pounds worth) and the ingredients have changed! It's now labeled as 7155 and it includes "animal protein products" and "porcine fat" in the ingredients. I can't imagine Harlan would put those ingredients in their foods. I'm waiting on a response from Harlan, I also tried to contact Sand Valley Farms but I've been told they're no longer in business.
My food bags have no contact info on them.
Can anyone shed some light on this???