Welcome to the forum....if you are like me, you will become addicted to it here! Congrats on your new baby! Simon did not want to take baths for quite awhile, but eventually he decided it was ok...we tossed his play ball in the water, and he finally got in. Now he loves his baths, and if I forget to put his "bathtub" on his cage playtop every other day, he will try bathing in his water bowl. Mine also prefers the water lukewarm, and he won't get in the tupperware thingy I use for a bath unless it is on his cagetop. As far as diet goes, ours was on a seed/pellet mixture when we got him, but I soon found out that he wanted NOTHING to do with pellets as long as there was a single seed in the bowl. I tried doing the conversion that is suggested on here, but I swear, as long as there was seed, he would NOT eat pellets. Finally after talking to my vet, I did a "cold turkey" conversion, and just switched to pellets (with veggies and fruit morning and night) and it's worked fine. You will be surprised how much healthier his feathers will look once he gets off seeds. As far as veggies go, for at least the first month, Simon would NOT touch anything in the veggie bowl but corn, which isn't so great for them. I just kept putting different veggies in every morning and night, and now there's really not much that he won't eat as far as veggies go. Simon is a bit odd about fruit, and really doesn't like anything but blueberries...but that's ok since veggies are better for him. One thing tho, he will not touch raw veggies at all. I just get a variety of frozen ones and some fresh, and microwave them for him. I don't really know about the scratching issue. Simon really doesn't do that, but whenever he gets new pin feathers on his head and neck that he can't get to, I have to help him preen the shafts off the new feathers, or they drive him nuts. Maybe Henrietta just needs a bit of preening from you. Just sort of roll the pin feathers around between your fingers and the shaft will start to disentigrate....looks sorta like they have a bad case of dandruff...lol.
Good luck! Henrietta is a beauty!