Horsenettle toxicity

We have baled some grass pasture hay in rounds that has a fair bit of horsenettle in it.

Has anyone had horsenettle poisoning either from grazing or feeding hay of 80% grass maybe ten percent horsenettle.

Plants range from early flower to late seed. They were raked so they are dry and crispy minus the fruit/seed.

We will be spraying soon for weed control . won't pasture on infested paddocks until weeds are dead dead to keep them from eating after spraying. Probably will feed these bales next winter as in 14-18 months from now, stored outside.

Does anyone know like a plants per acre that it is considered lethal?

Horsenettle toxicity