W vs GW Wellness food

Today I opened two cans of Wellness. I noticed one can was gold, the other
silver and the consistancy of the food looked different. The silver can
looked normal and smoother. I checked the labels on the bottom and neither
of them appeared to have a GW. The cats get a half can each and the two
cats I gave the gold can to refused to eat their food. I'm just wondering
if something might have happened again. I have at least a case of this
stuff, possibly more (I bought 10 cases at once, the rest are stacked in the
basement). Anyone else encountered this?