I noticed a little dried poo on one of my 6 day old chicks. While cleaning it with my husband, he noticed a scab (a little more than 1/8inch in diameter), 1/4 inch away from the chicks vent on its belly side. At first i thought it was a tick. But upon further inspection my husband thought it was just a scab and pulled it off. It was a pus/blood looking scab. Should I be concerned? After he pulled it off, it looks like a sore underneath it. I put some betadyne solution on. Any ideas what it was? Anything else I should do? This is my first year raising chicks, please state the obvious if I am missing something! Thank you so much.