Her strength is that there is supporting evidence for imprinting Guiton found that Leghorn chicks imprinted onto a yellow rubber glove that was used to feed them. The process of imprinting was so powerful that they later tried to mate with the glove. This supports Lorenzo's theory of imprinting, however, contrary to Lorenz's argument, this process was reversible after spending time with their own species. The chicks engaged in normal sexual behaviour with Leghorn chicks. This suggests imprinting is possible outside of the critical. suggested.