poorly hen

Hi can anyone advise me please i have a lovely little pekin and she became quiet,i noticed lice so whilst at vet took her along too,vet found abscess at vent gave baytril,now over last few days she has more of these abscess including one on her face,can anyone tell me what is wrong with my little lady,she isnt very old,2 yrs? vet suggested she is being peckked but i see none of this in this one,one of the other pekins is being picked on but no abscess on her

thanx for the link, but no its not like that ,she has 3 large abscess 2 in vent area,1 on cheek,
i will post fotos asap