I was out yesterday so I asked my sister to collect the eggs from our chicken pen. One of our hens got out and she didn't tell anyone so when my parents got home and let the dog out, he attacked her. He's a bull mastiff so he didn't bite her or even break the skin, only pined her to the ground. She was a bit ruffled up and scared but there was no blood so we quarantined her in the coop for a few hours to calm down and then let her out. They other chickens haven't picked on her since so we didn't worry. I checked her out and could find no wounds. But today, she got in the nest box and has just been standing there for a few hours, we haven't seen her get out. We really started to worry when she laid a off-white egg with brown speckles, which my mom things may be blood, and a very soft and deformed top (she always has laid brown eggs). My mom thinks it is probably internal injuries but we don't know what to do.