Those automatic feeders will leech a lot of things into the water, as well as provide him with enough to over feed and become bloated/SBD. A healthy betta can go 2 weeks without food, yes. I would feed him normal right as you are leaving, and right when you get back. Too many betta deaths had happened to members here who had used the weekend feeders to risk it.
As far as keeping the cat away.. make sure it has a lid and up high? Or in a bedroom and keep the door closed? I honestly don't know.. sometimes cats are just curious enough to look, others may try to jump on it.
Last edited by Myates; 10-08-2011 at 07:14 PM.