Now they are getting to the kind of age I'm more used to - I chicken out of the first 2/3 weeks if I can and get someone else to take them.
No point in messing with meat until they can lap properly, so I'd focus on that first. See if you can get them to lick milk from your fingers. Once they've mastered that, guide them with your milky fingers to the bowl of milk. If necessary stick your fingers in the bowl too so as they are licking your milky fingers, they have to lap at the milk bowl as well. They should pick it up in no time.
I suspect your grey one can actually lap very well and hasn't forgotten at all... he's being crafty and lazy and they WILL try it on with you as it's easier for them being fed by bottle than it is to lap in the early stages.
I always offer a bottle in addition to lapping for a few days at least. Perhaps 2 bottles a day to 2/3 bowls of milk. Maybe for a week until I can see they are lapping strongly. They will need practice as they will just go swimming in it at first.
Once they are lapping strongly, I discontinue the bottles unless I think they are having a struggle - sometimes a sibbling hogs the bowl and the smallest one can't get near.
And it doesn't matter how many bowls you supply, they WILL all try to drink out of the same bowl.
Four weeks old is usually the time I think about making a milky meat mush, but it does depend on how I think they are progressing. Some are ready sooner, some need a few more days. And I make it very milky, like a very runny porridge. I offer that two or three times a day plus a bowl of plain milk 2 or 3 times a day. After a few days on the really runny mush, I make the mixture gradually thicker each day until they are on 100% meat with no milk mixed in. At first you will find only one full meat meal a day is enough to send them to sleep for hours.
About 5/6 weeks they are down to one bowl of milk a day most days, maybe now and again 2 bowls if they are struggling, and I gradually phase the milk out by the 7th week and try to get them on water instead. They do protest as kittens love their milk (like human babies
) but sooner or later they have to accept they are big kittens now.
Every litter is different. Some take to it really well while others take their time. So all the above is a rough guide only.
