Lynch, G.L.; Zoellner, K.O.; Broce, A.B.; Riley, J.G.
(Kansas State University. Agricultural Experiment Station, 1982)
When both cows and calves were double-tagged (one tag per ear) with
ear tags impregnated with fenvalerate (Ectrin) or permethrin (Atroban),
the calves gained faster (P<.01) than when neither cows nor calves were
tagged. ...