I'm planning to put some goats out on some pasture that has been ungrazed for 5+ years. Could I just turn them loose out there or should I go and plant some things like clover beforehand? Ideally, I'll be practicing rotational grazing, but the fencing for that is costly so the whole pasture (4+acres) will be open until my ideal system is able to be implemented. Are there any plants I need to keep an eye out for that might A) cause problems for my goats and B) pass on some toxicity to us through their milk (think milk fever like Lincoln's mother)? How often should I deworm and with what? I prefer herbs over chemicals, with the latter being the choice for out of control issues.