The only thing that would worry me is the shampoo. I don't know what kind you used. Perhaps you could re-wash her with a cat champoo or use a little bit of baby shampoo(you should use cat shampoo but better baby than a dog if it's got flea stuff added in). Just make certain to cut the shampoo to use it. 1 part shampoo to 5-10 parts water. Just so it sudses up when used on her, but not so it's sticky. That would wash off any possible bad things in the dog shampoo that's disagreeing with her. Or if it left residue, she could have licked it off her own fur.

Generally, kittens should be energetic and have a hearty appetite. I think I would halve the amounts but feed twice a day still. If she isn't losing weight, but is still gaining weight, doesn't have loose poo, then I'd keep an eye on her. If she doesn't perk up in a day or so, you'd probably want to take her to a vet for a check.