The adult canine teeth, also known as tusks, erupt at about one year of age and continue to grow throughout a pig’s life. Tusks grow larger in boars (unneutered males) than sows (females). The tusks of a barrow (a male pig neutered while young) will not grow as quickly as in a boar. Tusks can grow quite large, and are often sharp. People and other pets can be injured by overgrown tusks. The frequency of tusk trimming required depends on the age and sex of the pig.