Hi Tedsmum, a friend of mine feeds her GSD those. He has 2 packs per day (beef and tripe). When she heard what I was feeding mine she tried him on some chicken thighs and now he's not fussed with Prize Choice!
Although Prize Choice is a good source of whole meat it's in the form of a 'burger' so the dog doesn't have to work at it. But if you're squeamish about handling body parts then it is an option for you.
The thing with feeding raw is you do have to get it right - the mistake a lot make is trying to give too many protein sources at the start and this can cause tummy upsets. Also some dogs are intolerant to certain meat / chicken. Have a look at
United Kingdom Raw Meaty Bones Support & Action Group for advice, there's others too.
If you can cope with handling raw chicken, maybe start on that? You can buy packs of thighs in the supermarket so you don't have to cut anything up... For a balanced diet the dog needs some offal and that's a bit groo if you're not used to it.
Slicing up a sheep's stomach takes some getting used to! That's best fed outside cos of the smell. My butcher thinks I do pretty well for someone who doesn't eat meat

Tonight's menu is lamb necks - they look like, well a neck!