Judson et. al. 2009 evaluated Tonic plantain in New Zealand as a lactation feed for twin-bearing ewes lambing in August. This was a breakthrough, as no longer was ryegrass the sole focus of a forage species on summer live weight gain potential. The importance of Tonic's success in this series of studies was its ability to support a twin-bearing lactating ewe in late winter, and still produce big lambs by weaning. Tonic had an advantage of between 10 and 34% greater weaning weight than ryegrass over the four studies.