Supplement ingredients...

(I'm copying/pasting this from something I posted in January on the forum I help moderate. I've been thinking about this a lot and am still undecided. (I always like to get a lot of people's opinions before making a plan.) The source of the ingredients is a BIG deal for me. I'd like to get Trixsyn because they've said that none of their ingredients come from China, but I don't know if that is completely true, since it's not very realistic for most supplement companies to not get any ingredients from China.)

I'd like to begin both of my dogs on a joint supplement in the spring, which is when the snow melts and they can have more exercise and do more agility. From April to October, Mika gets an average of 1 hour of daily exercise (hiking and agility). Wall-e gets an average of 2 hours of daily exercise (hiking, agility, playing, and chasing cars along the fence in the backyard...lol). So their joints are under quite a bit of stress....

At the moment, they get salmon oil twice a week and Prozyme (digestive enzyme) with food that needs to be cooked. I feed raw.

The main supplements I've been considering are Sashas Blend, Glycoflex I or II, Cosequin, and Trixsyn. But the biggest concern that I have is the sources of the ingredients. The 2007 melamine pet food recall gave a lot of people a scare. My dogs and my cat were thankfully not affected by it because they were eating a combination of raw and Fromm Four-Star kibble at the time, but I'm concerned about where the ingredients in dog supplements are coming from. I've read that a lot of glucosamine comes from China, and I don't want to give my dogs any ingredients from China that might have contaminants. Trixsyn *says* that none of its ingredients come from China, but I dunno....

I guess I'm just asking, do you think supplements are necessary for active dogs? If you supplement, what product(s) do you use, and what results have you observed? Do you think the source of the ingredients is a concern?