Hi my friend had 4 chooks they are around 2 yrs old now were real healthy they had an episode last yr where her basset hound arthur got into the coup and caused major damage she returned to 4 chickens lying lifeless and bloody on the lawn ,fortunitly none died but the weeks and months following each one went down hill stopped laying and just started dying ,one had to be put out of its misery yesterday as it stopped eating and drinking and its tail feathers were drooped was like this for a few days , so she is down to the last one now and she is concerned its lonely she has asked if it can come live in my flock but im concerened it may have something wrong with it to she seems happy and healthy walking round eating bugs and doing all the things chooks do ,i know my flock will accept her as they have been awesome with others i have introduced im just worried there may be an underlining problem .. do you think it is most probaly just the dog attack that finished the others off ,she is getting 1 egg which i assume is from this one please help i feel so bad for the hen she would love it here and be very happy but do i take the risk ??????