The effects of zeranol (Ralgro) , albendazole (Valbazen) , and copper treatment on growth rate and faecal egg counts of weaner steers grazing winter oats

Llewelyn, D.; Copland, R.S.; Plastos, A.W.

Proceedings of the Australian Society of Animal Production Animal Production in Australia 15: 709

1984


Accession: 001266554

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Abstract
Growth rates and faecal egg counts were investigated in 8 groups of 25 to 30 steers in a 2 x 2 x 2 factorial experiment involving treatments with zeranol, copper and albendazole. After grazing oats for 111 days the increased weight gains for all animals drenched (3.92 kg) and treated with zeranol were less than expected, considering the relatively high parasite burdens of undrenched animals and the low-reinfestation during the fattening period. Copper treatment significantly decreased faecal egg counts, but did not increase weight gain. Zeranol (an anabolic agent) significantly increased faecal egg counts; it is suggested that drenching may be more important in animals treated with zeranol.