........do they really fight with each other if they are living under one roof?

well, its just that we're having a kitty in one month's time so i'm just wondering and kinda worried if my dogs (especially Beethoven) will be getting along fine w/ the new kitty......

i also have guinea pigs and a hamster..... mmm, will the kitty hate my pigs and hamster??? or consider them for lunch?

what do you guys think?