They've had raw bits on and off for years, so is suppose it isnt like going completely cold turkey (heehee) on them.
they used to get kibble in the morning, left down all day, and at night wet food. often times there would still be food over the next morning.
i originally i kept the kibble down, and then at night mix half of raw food with half of the wet food. after about a week i gave them wet food in the morning, and then wet food/raw food mix at night. (with it being wet, i had to think a bit more about how much they needed as they wouldnt eat wet food if it sat out).
eventually they were getting the wet/raw mix twice a day, and i just kept gradually reducing the wet mix to just the raw mix. I also was giving them the wet food they liked the least... and make sure you give them the raw flavours they like the most! (rabbit and the chicken/lamb mix was a big hit)
it has actually been alright to transition them, and i am now in the process of actually measuring how much they should get a day, and giving them more 'set' meal times as opposed to food being down all day. chloe was a bit resistant, but i just kept plonking her infront of the food. (i think it also helped that i never gave them the same brand/flavour two packs in a row. They always had something new every few days).
for the offal, i started off with smaller chunks, and then gradually just made them bigger. maybe 20p sized? I can now give chloe bigger ones (maybe 3 inches long?) but i wouldnt want to go much bigger in case fonzie steals it. (i do have to be a bit careful about them. even though he isn't picky, he only has canines so although he tries to gum food, he ends up usually swallowing pieces whole.... and then puking them back up because they are stuck.....)
it did take chloe a while to understand that offal (heart, liver and kidneys) are edible, but having a cat and a dog stare at you helps the process along.... heart is her favourite, and the most important.
I'm still trying to get her to 'chew' meat and bones, but she's starting to get it. I can get her to take a couple of crunches on some soft raw chicken ribs (from a chicken carcass) or get her to chew a piece of diced chicken or turkey, but she gets a bit bored and wanders off. (Fonzie will strip a chicken wing using the neck/gum/claw method).
I have had some success with small pieces of bone (such as lamb breast) and me actually holding it, but i think 50p sizes are about as much effort as chloe wants to put in. (i've had much greater success with the dog!) to ensure they are getting the bone, I make sure they have some of the mvm meat with bone in it.
I'm currently feeding them a mixture of manifold valley meat (they come in 1lb sausages), the yellow sticker line at all good supermarkets and offal. so far i think it is working out okay. It gets delivered once a month, and i split the delivery charges with 7 other people. (£10 delivery for as much as you want. my cost is about £1.20). http://www.manifoldvalleymeats.co.uk/barf-diet-products/
picked up a sea bass and some diced turkey tonight! (Ill freeze them for a week to get rid of any bacteria and then they can be spoit at some time in the future.)
i use the 80% meat (including heart), 10% bone, 5% liver, and 5% offal (kidney, spleen, pancreas etc) method.
If you want to to deal with the %, and JUST feed meat, you can get felieni complete from zooplus which supposedly turns just meat into all the nutrients they need. (No bone or liver required).
if they liked cooked food, just try cooking it less and less each time, or, even just flash frying it. just to get the smell?7
hope that helps! : )