henmania
Chirping
You know, if my 6 years of raising hens has taught me anything, it's that there is no one normal way a chicken will behave. And while 9 months does seem rather early. I have 2 BO's and they didn't do their first molt till they were 2 1/2 years old. And they had some ratty taddy feathers.
So she certainly could be molting. Combs do tend to go pale when they molt. The only thing I'd be suspicious of is worms or parasites. You could have a vet do a fecal float on a dropping just to rule that out. Otherwise, you are doing the right things. Keep up the protein. I'll bet she's just molting.
I'm also new and have 2 BOs. They too seem a bit pale since the weathers gotten colder and I see feathers all over the garden. They free range all day till they run back into their coop. Their behaviour is pretty normal I'd say and I haven't noticed any behaviour that might suggest mites or parasites or worms.
I just assumed that they turn a bit pale since they're not receiving as much sun.