It's a dogs life

My black lab loves Forthglade puppy food - it smells appetising and is a great consistency. So as he got up to 10 months old I started looking for new flavours to keep him happy. But oh my god - the beef one smells like death! I purchased a box of 18 trays which I am getting through slowly but I gag every time I open the packet. My dog is a lab and therefore is happy to tuck into a anything - including a decaying fox in the lane at th back of our house - so I haven't taken his enthusiasm as anything but pure doggy greed. All the other food I give him smells - well not necessarily like a fine pate- but certainly some thing that (in extremis) I might eat. But dear god the smell of this one is toe curlingly bad. What on earth is in it! Once we have muscled through the packs it will not be darkening my larder door again.....