This autofeeder is highly rated (but expensive) http://www.amazon.com/Super-Feeder-Automatic-Analog-Capacity/dp/B00428TOBC/ref=sr_1_1?ie=UTF8&qid=1441768495&sr=8-1&keywords=automatic+cat+feeder+super
many of the other auto feeders on the market are not very good. cats can hit it down and break it open.
if you get a cheaper one, you could build a box (or use a small shelf system) to conceal/protect the autofeeder. there would be a smaller hole somewhere for the food to dispense below.
I had an obese cat (21 lbs) and bought this to control food. Attached to a timer I have it dispense food 5 times a day. The amount of food can be customized as well as the times and # of times. Cat cannot break into it. It also has an extra attachment you can buy that will increase capacity. I have it and fill it once very month or so.
He now weighs 14 lbs.
Super Feeder Automatic Cat Feeder, CSF-3, Stand/Bowl, Analog Timer https://www.amazon.com/dp/B00428TOBC/ref=cm_sw_r_cp_api_kh30Bb448B8WA
Consider the Super Feeder CSF-3. It's built like a tank and I haven't heard of any cat breaking in. To promote self-control, you can also connect it to a cycle repeat timer so it feeds tiny portions down to every few minutes. It's pricey, but I think it's worth it.
Easier option- check out the Super Feeder. Or buy it from Amazon here.
Website looks like it's from 1998 but the product is pretty solid. Runs on 9-24v AC or DC. It's intentionally 'dumb'-- when power is applied it runs the motor for a configurable time interval (or just turn it all the way up and it will run until power is removed).
Easiest HA setup- tweak the dispense time on the super feeder, plug it into a smart plug type module, and make a 'feed' event that turns on the smart plug for 15 seconds (or a bit longer than your configured time interval) then turns it off.
Get a feeder called the Super Feeder. There's actually a bunch of options with this, see their 1990s era website here: http://www.super-feeder.com/csfmodel.html
This feeder is 'dumb' in that it has no internal timer, but that's a good thing. When power to it is turned on, it dispenses one portion of food and then stops. So rather than program a timer on the device, you just use a 120v timer (like one of those things with the dial that turns once a day) and plug its power adapter into that.
So this provides a few ways to ensure synced feeding. If you have some kind of home automation system like Smart Things, Vera, X-10, etc. just plug both feeders into appliance control modules and set them to activate at the same time for 5 minutes then shut off.
Alternatively, one power adapter can run two feeders. So put feeder #1 and the timer in one room, then run a second wire from there to feeder #2 in the other room. The power adapter has screw terminals so you can easily wire both together.
Either way the result is both feeders go off at exactly the same time.