I have used Missing Link+ for over a year now. I am well pleased with the product. I don't remember if it loosened our dogs stools, but any change in diet can. At first I measured, but now I put it in a spice bottle which I keep refrigerated and liberally sprinkle it over their food. After using it for so long, I can "eyeball" approximately 1 teaspoon. The directions on the amount to feed should be on the bag, I don't have the bag anymore -- just put the last of the ML+ in a spice bottle. ML+ is a very safe product to use, it is a "superfood" rather than an artificial source of vitamins. GOOD LUCK!
btw.... just found a terrific site with GREAT prices for the ML -- $10.19 plus $5.00 ups ground shipping.
http://www.petvetdirect.com