My newborn kitten, Lucky's umbilical cord recently fell off. I noticed the today the site looked like it was yellow and pus filled. I started to do some research to find out if this was normal (didn't think it was) and when I looked at it again it had actually opened and there was yellow tinted (mostly looked white) pus coming out of it I wiped it up and now I need to know if there's something I can or should do for the area.