Talking to familiars is as simple as right clicking and selecting the interact option, in different circumstances more possible speech is available e.g. having chicken in your inventory whilst talking to a dreadfowel.
However to communicate and understand what the familiar is saying is relative to your summoning level, after every few levels you gain in summoning you can understand a different level familiar. To check out the dialog just visit the familiars dialog page
hope this helps --F-Zero 08:35, 30 April 2009 (UTC)