Neither thinness nor worms are a problem here. So no need for ivermectin or pellets of any kind. The thin goat was a starved rescue a year ago.
I am really much more interested in facts (or opinions based on facts) than simply opinions when it comes to deworming....so that is why I learned to run my own fecals.
So for anyone reading this who is concerned about the well-being of my goats, I assure you they are now all in great shape and healthy and happy, expressing their goatiness, to paraphrase Joel Salatin (loosely!) This includes the desperately thin goat of the original post, about year ago, who was starving, not wormy.
I won't be giving anyone here dewormers, either herbal or chemical, unless fecal exams dictate the necessity. MY opinion (based on facts) is that worming by the calender encourages worm species to adapt through un-natural selection, when the individuals with the shortest time to reproductive maturity survive to reproduce, and their offspring do the same, until we have a population of worms that mature and breed so quickly that the chemical wormers are no longer functionally effective.