mesocosm,cow,treatment,ave_weight,ave_head_size 10,4,Control,0.232,3.816 11,10,Antibiotic,0.156,3.225 12,3,Antibiotic,0.231,3.253 13,7,Antibiotic,0.098,1.973 16,5,Control,0.115,3.270 17,9,Control,0.033,3.130 19,2,Antibiotic,0.079,3.153 21,3,Antibiotic,0.150,3.350 22,6,Control,0.193,3.333 23,5,Control,0.024,1.350 24,10,Antibiotic,0.121,3.230 25,1,Antibiotic,0.067,NA 26,7,Antibiotic,0.155,3.118 28,8,Control,0.071,2.050 29,8,Control,0.148,2.942 30,6,Control,0.244,3.395 31,4,Control,0.169,3.033