Hi first post, so please bear with me if I don't get it quite right.
Today in Tesco Coatbridge I found large bags of Iams 10kg Large Proactive Complete roast chicken flavour dog food (green bag with pic of Great dane), reduced to clear at the end of an aisle. It may be store specific but I have no way of knowing this.
There are still quite a few bags left in my local.
The 7.5kg one sells for £19-£20 so this is a real bargain. Hope you can get some.