My white crested black polish pullet has been more inactive the last week and staying in the corner of the brooder with her head drooped throughout the day. She also has a bright pink color on the edge of her beak. This is my first time owning chickens so i am wondering if this is anything to worry about? She seems to be eating and drinking normally and has moments where she starts to play with our other chicken but she isn't as lively and active as the other polish chicken. Any advice would be appreciated, thank you. Pictures attached. Polish chicken is about 12 weeks old.