Can deal bleeding, but a bit slower and altogether less dangerous than their demon's souls counterparts.
Attention though, they can evade your hits pretty well. When they do, re-position yourself so that two of them cannot flank you. Flanking attacks are very frequent in this game (more than in Demon's Souls) because some enemies can dodge your impressive swings. Getting flanked by poisonous enemies is very frightening. Fear, in Dark Souls, leads to your bonfire.