I have three, four week old rhode island red chicks. one of them has a yellow comb and wattles. The other two have the red. I have researched and everything says they should be red. I put acv in their water once a week and they have diatamacious earth & dirt for their dirt bath. The articles I read say if they don't have red combs that there is something wrong. does anyone know what the matter is?