When on a tight budget in the past I have often used Super Greyhound for my (non-greyhound) dog (although now he's gettin older I give him more tins of chappie) and also my old bitch, they thrived on it - it's really high in protein, great for energy and a shiny coat, and was the cheapest dry meal I think I've ever found! Can't remember the exact price (about £9-£11 for a ginormous sack?) - although they didn't usually stock it the local pet & garden store used to order it in for me, so maybe ask your pet food supplier about it if it sounds like it'd be suitable.