1. Ergot fungus: This is a type of fungus that infects rye and other grains. It produces toxins that can cause serious health problems in animals, including horses. The fungus itself doesn't "grow back" in the sense of regrowing after being removed. It's a parasitic fungus that lives on the grain, and the infected grain needs to be removed to prevent further problems.
2. Ergot on a horse: This could refer to the effects of ingesting ergot-infected grain, which can cause a condition called ergotism. Ergotism doesn't "grow back" either. It's a condition caused by toxins, and the effects usually subside once the horse stops ingesting the infected grain and receives appropriate treatment.
Here's a breakdown:
* Ergot fungus: Doesn't "grow back" in the traditional sense. It needs to be removed from the grain.
* Ergotism (effects of ergot): Doesn't "grow back." It's a condition caused by toxins, and the effects usually subside with treatment.
If you are concerned about ergot and your horse, it's best to consult with a veterinarian. They can help diagnose the problem and advise on the best course of action.