I'm with Kay on this one - what they like is generally what they do well on, even if it doesn't meet our own expectations.
Just as some hoomans have to eat restricted diets, so do some cats. And just as some of us hoomans can thrive on "junk food" so do some cats.
I think the fact the boys trotty bottoms have cleared up is a good indicator, but then again, quite often when you bring a new cat or kitten home, any change of diet will upset their tums a bit.
Don't take it too much to heart. You're doing a great job, you're really caring about your new family additions and doing your darndest to make sure they get the best possible start in life now they're with you.
And if you weren't worrying, you wouldn't be a normal kitten parent.
Whjen we had one of our previous kittens, Ross, I thought we'd "kitten proofed" our house really well.
Until the day he fell from the top of the landing on to the sofa in the lounge below
I don't mind telling you my heart stopped in the instant I saw his little roly-poly body fall, yet he just took it in his stride, righted himself and scampered away like nothing major had just happened. Whereas I was in bits.
You're doing well. More Photos, pleeze?