Heh, I would say about 1/3 scoop or just under for TucTuc, 1/3 for Nana, and maybe start Mojie at 1/3 but monitor his weight...if you feed 2 meals a day, split that amount in 1/2. I think Ziwi is a great food but you feed soooo little. I am not psycologically strong enough to feed it alone lol, my dogs were always acting more starved than usual.
I'm pretty sure I already suggested this to you but adding about 2oz of water to each meal slows my pups down quite a bit. Plus it also gives them a bit of hydration to help process the food. Not sure if you do or not...but it really does help.
I'd not give more than recommended because you may find that they put on some weight. Or not...I had to up my pups intake of ZP because they actually got too skinny & that was on the recommended feeding amount for each. But some find their pups gain weight. I guess it depends on the dog & their metabolism.