Hen with yucky bottom

[sealcovechickens]

One of my hen's bottoms is somewhat yucky, some blood and goopy. Every once in a while she yips and does a tail dip. Is this being egg bound? My hens are just beginning to give one or two eggs a day (five months old) and the days are getting shorter and colder here in Maine so I assume production is wait until the days get longer. Any advise? Thanks for any info., sealcovechickens