You're supposed to rub it into fat, since it gets absorbed and stored in fat and released slowly over time. That's the most efficient way of using the pure injectable Ivermectin you can get for cattle, since it has less bio-availability when taken orally.

You're supposed to rub it into fat, since it gets absorbed and stored in fat and released slowly over time. That's the most efficient way of using the pure injectable Ivermectin you can get for cattle, since it's has less bio-availability when taken orally.