Concentration of Chlortetracycline in the Blood of Yellow-Crowned Amazon Parrots Fed Medicated Pelleted Feeds

Chlortetracycline (CTC) concentrations of 0.18 to 7.7 μg/ml, 1.4 to 4.8 μg/ml, and 1.3 to 6.3 μg/ml were attained in the blood of Yellow-Crowned Amazon parrots (Amazona ochrocephala) fed pellets containing 1%, 1.5%, and 1.75% CTC. Some CTC activity in the feed samples was lost during the course of t...

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