OOooo, your dogs are going to loooove you even more
I am not an expert on the veggie bit of things so I'll leave that to others and I'll deal with the meat, bones, animal bit
Also I'm not sure which kibble you feed but I know some is not great for feeding alongside raw and if I were you I'd make my own treats
I'm sure someone else will tell you which kibbles are ok and when is safe to use them.
As for Ben, well he's still not that old so I would say you're doing this in time for him to really benefit. You might find he takes longer to get his digestive system going properly compared to Pops but I really wouldn't worry about him
OK, what you are trying to get to with each dog is the following:
HOW MUCH
You either aim for 20% of their ideal adult weight (even the pup) over the course of a week OR you go with somewhere between 1 to 3% of their ideal adult weight per day. The range allows for differing activity levels etc. I'd start off with 2% and keep an eye on how they do, you can then adjust up or down accordingly, it really is only a guide and unless you have real piggies they tend not to overeat as much on raw as there's no additives etc to spur them on (think about how you are with a tube of pringles v a bag of grapes
). So that's how much, doesn't even need to be bang on every day, think about how some days you eat more than others and you're fine
WHAT
What you're trying to get to is a decent variety of RMB (although some dogs do manage ok on one protein source), chicken (although hear what you say re Sash), turkey and rabbit are all excellent base meats (as I call them as in what is your default meat and then you add variety to that). For these animals your dogs should be able to pretty much eat every part of the animal (as opposed to cattle where leg bones would be too hard for them to eat). Alongside this you can feed pork ribs, lamb ribs, pretty much whatever you can get your hands on to give them a variety of meat sources.
There are varying levels of bone in amongst that that people feed and some dogs do better on more bone, some less, Ted tends to need a bit of bone in most meals or I am cleaning up less than solid poos, this is something I worked out with Ted over time and if you don't get it spot on from day one it really doesn't matter, you can tweak as you go.
In addition to the above you want about 10% of their diet to be offal (and about half of this liver), this is on average over time, not every day so I feed liver once or twice a week and kidney and ox heart once a week. I'd be bringing the liver in first but veeeeery slowly, think a nail cutting amount to start with and build from there or you will get bottom explosions
So to start with they won't be getting 10% per week, you build up to this.
Because our meat tends to be heavily fed on grain it's good for the dogs to get some oily fish (sardines are good for this and nice and cheap), I feed Ted fish once or twice a week. Some dogs don't like fish and you can give them salmon oil instead (which I guess would be good for Sash), these oils vary in quality so be careful, if it were me I'd use the oil to start with and then introduce raw fish later so you're not trying to do too many things at once.
Finally they'll benefit from a raw egg once a week or so but again I'd leave this until you've got the main bit of the diet sorted.
I would say it took me two to three months to get to what I describe above so don't feel you need to do it all at once as that is why people never start it!
HOW TO START
I would start with rabbit (There is a great rabbit supplier in the Shetlands who delivers nationally. His name is David and the telephone number is 01950 460113. He will prepare the rabbit how you wish i.e. with skin and fur, without fur, without fur and skin, etc. I'd use him as you'll be getting through some with 3 of them!). If you opt for the rabbit to have the offal left in (I do) then I would remove this and turn it into treats/keep it in the freezer to feed them when you start to introduce it). Give each dog the amount you've calculated they need (separate them as even dogs that have eaten kibble side by side in harmony can get a bit excitable around RMB) and let them get on with it. If they look confused cut some slits in the flesh so that they can smell more. Ted play bowed to his first ever raw meal and danced around it for 5 minutes before taking a tentative lick then getting stuck in. Some dogs take to it easier than others.
With Sash I would stick with rabbit only for a good month and see how she does, I understand allergies can take a while to respond and if you give her other meats too soon you'll never know how each thing is effecting her. It really is no problem to give her the same type of food over and over as it's only in the short term.
With Ben and Pops you just need them to have nice solid poos for a good few days so you know they are digesting ok and you're feeding the right amounts and right amount of bone etc (as you're chopping up whole rabbits they should get the right bone to meat ratio). This can take days or weeks, it really doesn't matter and there's no rush to introduce variety, I had Ted on chicken for a month before I even started with liver etc.
Once you've got solid poos and you're happy start bringing in the offal (SLOWLY) and then when you've got this sorted try other proteins, fish etc but always do it so that you know how each thing is effecting them.
As you have 3 dogs to switch and one of the is Sash I'd be tempted to speadsheet what you put in and what comes out
For me it would be the only way to keep track, but you may have a better memory.
FEAR
The first time you do this your heart may stop beating. I spent the first few times fearing Ted would choke, cut his mouth on a bone etc etc. It's normal to worry but they will be fine. Sometimes Ted gets something stuck on the roof of his mouth or swallows an over ambitious large piece and has to wait for it to go down but he is always fine. Your dogs are as likely to choke on kibble etc as raw
Now I really don't worry at all, I don't let him eat unsupervised but I am completely relaxed and he is a pro now. He leaves bones shards which goes to show he knows what is and isn't safe.
AND FINALLY
You don't have to get it 100% right from the start for it to be better than kibble and your dogs to be ok. You never have to get it 100% right every day, it's balance over time that is important (the pet food companies have confused us with their balanced every day pish) so it is easy once you get the hang of it.
It will be the best thing you ever did and before you know it you will wonder how you could possibly feed them anything but a raw diet.
Come back and ask as much as you want, no question is too silly or trivial, and there's always PM for the
questions
