I use VermX pellets for worming cattle and sheep. Now, the sheep pellets cost more so I contacted the company and asked if there was ANY reason why the sheep couldn't have the cattle version. They said there was a slight difference in the formula, but other than that no. They do pellets for cattle,sheep, poultry, horses, goats, llama, pigs even dogs and cats. Get on line, pull up the ingredients list and compare. If not sure, ask the company!
Also, when I had many pigs and before I knew about VermX, I sent Norbrook an email explaining being a smallholder and poor etc, but that I had Noromectin drench in stock and would it be safe for pigs. The company vet got back to me and explained how to dose with it, per KG, withdrawal rules etc as the water supply is a 20 litre jerry can filled twice daily.