Janna the Nerdy Neopian

Warning: This post will make no sense if you are not familiar with Neopets.

I'm a Neopets fanatic.
If you guessed that this implies I am a nerd with too much time on my hands, you would be partially correct.

Anyway, I've had Neopets (and neo-Petpets) for over seven years now. I've been intrigued by one Petpet called a "Doglefox". The item description is this: "A cute mongrel that delights in finding small treats for your neopet."
I remember the days when they were "unbuyable", meaning you could only acquire one through the Neopian Island Trading Post for over 100,000 neopoints.
Today, though, I happened to notice that now they're cheap enough to buy in the Neopian shops. The cheapest are around 80,000 neopoints.
I have over a million neopoints rotting away in my neo-bank, so I kinda wanted to give this whole Doglefox thing a try.
While searching, I happened to find a different-colored version called a "Christmas Doglefox". The description was still the same ("A cute mongrel that delights in finding small treats for your neopet."). Yet the Christmas Doglefox was only around 30,000 neopoints. (Probably cheaper because it's uglier). I managed to find one for 29,500, and bought it.
Here's my question:
How do I get it to start finding the aforementioned "treats" for my neopets? Will they just start turning up as random events? What kind of items will they be? Edible stuff like crackers or fish or apples? Or worthless one-point crap like seaweed and driftwood? How often do the items appear? Does its owner-pet have to be the "actively selected" neopet for the events to occur? Or will the events still happen even if I've selected one of my other three neopets to play with at the moment?
Or is it all just nonsense, and the Doglefox doesn't REALLY find treats for your neopet? If that's the case, I'll just put the little guy in my neo-shop and sell him to someone else.

Does anyone have the answers to these perplexing Neo-Questions?
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