You don't NEED to use a supplement. There are many people who don't. If I had to choose though, I would go with Ryerson's, mainly because it's been tested many, many years on thousands and thousands of chins. To me, that shows that it is safe and not just something thrown together.
As far as dust, the very best is Blue Cloud and after that Blue Sparkle.
ETA: I went and looked at the site, and no, I would not feed those supplements, mainly because of the sunflower seeds. I see no purpose to them healthwise to a chin and have had it hammered into my head by my mentor who is also a vet - no nuts for chins, period. I was told they are too high in fat and can cause liver issues. It seems like every time you turn around now, when a chin dies and a necropsy is done, the first thing they say is liver issues. I'm not going to risk that. I think otherwise the supplements are fine, I would just leave out the seeds.
Treatwise? Apricots have pits. You are never supposed to feed an animal anything with a pit. We are also not huge advocators of raisins/craisins on this website. They are loaded with sugar and they are just not necessary. There are other treats that are better, and safer, for your chin.
Bite sized, non-sugared shredded wheat.
Dried rosehips.
The occasional cheerio.
A pinch of old fashioned oats.
Lots of wood chews that are safe for chins:
http://www.chins-n-hedgies.com/forums/showthread.php?t=34
