I have two Jack Russells who are 9 yrs old and ProPlan is the only food they have ever eaten.  They have never had skin or coat issues until now.  Of course the dogs love it and gobble it up.  They have eaten multiple bags of this, all bought at different times and different store locations.  They started having these issues within about 1 to 2 weeks of eating the new food. 

This was a great concept from Purina but they failed with the nutrition end of the deal!

I am now in the process of finding them a new dog food.  I will contact ProPlan to bring back the old formula or I will never buy...