Freezing, ideally for 2 weeks, destroys bacteria.
Don't forget that dogs' stomachs are far better coping with bacteria than ours too
just think of the rubbish they manage to pick up and consume with no problems.
If the dog isn't sure about a chicken wing etc, try flash frying it, leave to cool for a couple of minutes and then feed - sometimes that gets them going.
Lamb or pork ribs are usually popular, lumps of pork tend to give mine the runs. They love chicken thighs or wings, rabbit {someone locally shoots rabbits and gives them to me for the dogs. I freeze it in portions and they go mad for it.}
We still feed some kibble, mainly fish4dogs now, which is fish and potato, very good quality at a reasonable price.
I have done lots of research into natural feeding over the years, Dr Richard Pitcairn's book is very helpful, I also found this website offered very sensible advice
http://moellgaard.dk/english/dogs/barf/barf_feeding.htm
We also do some home cooking. We're gradually introducing veg - mainly green leafy veg, which is pureed; hard squash such as pumpkin need to be cooked - I tried that yesterday and they love it!!
The Britbarf yahoo group is very helpful too.
http://pets.groups.yahoo.com/group/BritBarf/
You're aiming to feed about 3% of the dog's bodyweight per day - so for a 10kg dog, 300g.
A max of 15% bone {chicken wings are 30 - 35%} - you judge this on the consistency of the stools - if they are runny, then they need more bone. Constipation = too much bone.
Muscle meat, which for raw feeding purpose includes the 'offals' tripe, tongue and heart should be around 60-70%, and glandular organs such as liver and kidney from 10-20%. The latter need to be introduced carefully in small amounts.
Some people feed veg - I think this gives vitamins etc, mine love veg and fruit, the pups adore bananas LOL I'm aiming for 2 tablespoons per day.
That should give you a start point - really you need to judge it on how your dog is looking on the diet.