I have a one year old Silver Laced Wyandotte who two days ago started looking pale in the face and comb. She will intermittently look better and redden up and then get pale again. It seems that when she gets "excited" she gets flush then turns pale when she is relaxed. I will go out and she looks fine then later she is pale again. She also seems to be favoring one leg a bit like she is slightly limping but runs off like normal if she thinks you are going to catch her. She is eating and foraging like normal as far as I can tell and we have been giving treats of cheese, yogurt and scrambled egg. I also took to putting vitamin B complex in the water this fall when I had another girl inexplicably ill who got better with tons of B complex. I have been giving the currently sick hen a bit extra vitamins as well as what is in the water. I have considered giving her some extra chick feed left from the chicks I just integrated out to the flock. Any ideas what could be the problem?