For example, author Wolfgang de Grahl says in his 1987 book The Grey Parrot that some importers had parrots drink only coffee while they were shipped by boat, believing that pure water was detrimental and that their actions would increase survival rates during shipping.
Por exemplo, o autor Wolfgang de Grahl di no seu libro O papagaio gris de 1987 que algúns importadores lle daban de beber aos papagaios só café mentres estaban embarcados en buques, crendo que a auga pura era prexudicial para eles e que iso incrementaría as taxas de supervivencia durante as travesías.