To be honest, you aren't going to find any closer than raw to go. You won't need to add in much more apart from like a few bone in meals and one organ meal a week.
If he's 7lbs and you want to maintain that weight, you would feed him 3oz a day. So 1.5 in the morning, 1.5 in the evening.
I personally cant do ounces lol so in grams, this is what I'd do...
3oz is about 85g which is what Chaos gets a day. I defrost the pack of raw to go, then I weigh out 85g portions, put it in to freezer bags, write what is it on the front (and who its for, but you only have one) and freeze. Then the night before, I get out the bag, put it on a plate and into the fridge to defrost. In the morning I give half of whats in the bag and half again at dinner time.
I like to add in extra liver to top up what he's getting from the mix so I add in 30g on a Saturday. You could give with a chicken wing tip. And you can split between two days so its not an entire meal, I just do it that way because I can remember it and I give the duck mix (because its bone heavy) on the Friday night.
On the days you're giving bone in, you can give a chicken or duck neck. Just cut off and weigh 42ish grams and give it to him.
And this is all only because I am so anal about how much they're getting. I admit some days they do get more if I'm not too fussed with weighing or im in a rush. It doesn't have to be completely exact
I know it seems daunting but raw to go makes it SO much easier. I'm lazy and I have 4 dogs and I promise you, once you've portioned up the food, its just like feeding kibble, obviously except for bone-in meal days, which I would definitely still give if you want the dental benefits.
You don't have to do it how I've said, just giving you an idea of what I do. Everyone finds what they're comfortable with and can adjust it to their own dog.
As an example of cost, the mixes come in 454g packs. That will give you about 5 days for Louie. The lamb mix is 65p per pack so it would cost you 65p to feed Louie for 5 days. DEFINITELY worth it and will work out loads cheaper than kibble
that will last just over a week, what a waste of money 