I have a 5 year old Roomba, and it works so well, I bought another one a couple years ago. Fairly large house, 4 furry dogs, and yes a parrot. Seeds would be no problem (but our parrot doesn't eat seeds). Dog hair is no problem. They run under the sofa, go over any flooring transitions, go right over a hula hoop, spit out any fringe on the edge of a carpet, and then when they are almost out of charge, they go to their base and charge themselves up again. I can't say enough about these 2 little workhorses. You know they work because of all the stuff you clean out of the bin and I usually use a scissors to cut all their hair off the rollers, but they are pretty easy to clean, and it's quite satisfying.

You can set them on timers (I don't bother with that), and you can corral them in one room with a little laser beam emitter-thingy. They do get stuck sometimes, under a cabinet maybe, or one will lock himself in the bathroom, but nothing to complain about. They are still going strong!