i had 3 roosters and one hen get killed mon night. i went and got 10 more chickens ( mostly full grown bantams) and they all got killed last night. the coop is a foot off the ground and has 2 in mesh chicken wire on it. there is two holes about 6 in high by 10 in long on each side of the coop. i have a domestic cat and a chihuahua that have been around the chickens and never tried to get them. what do yall think it could be? i checked on them at midnight and they were fine but when i got up at 5 they were all dead or missing.