They're doing well. I tried starting them on solid food last week since they turned 4 weeks old, but they weren't really interested. I think that's changed though so I'm going to give it another shot. It sucks though, because Iams kitten food doesn't really get mushy when I add the formula to it, and the pieces are really big, so I went out and got some regular old kitten chow. Other than that, they're playing non-stop when they aren't sleeping, and they've already started using the litter box. They aren't scared of dogs, other cats, or ferrets, and they're socializing with everyone. Three more weeks and two of them will be ready for their new homes after I take them to get their shots, the other two are staying with us.