I always loved the CortaFlx before the HA and can't say enough about the product WITH the HA. Hyaluronic acid has long been a mainstay for big horse performance types, but until recently was only available in injectable form which was quite expensive. Now that the oral form is available, we can reap the benefits of HA without the needles in the hocks. Hyaluronic acid is sometimes called "nature's moisturizer". It's benefits are similar to glucosamine and chondroitin, but different. It is a naturally occuring substance in our bodies.
As far as dosing CortaFlx for a miniature, remember that for the first three days you are going to give a loading dose which is twice as much as the maintenance dose. You can figure that out by reading the instructions for the big horse dose, then reducing that by 75%. In other words, for the first 3 days, you'll fill it up to the 1/2 mark (in a big horse you'd fill it up to the 1 mark x 2), then starting with day 4 you will fill it up to one-half of the 1/2 mark. If that's too confusing, just figure 25% of the big horse dose. You may see positive results in as little as 24 hours.
And if you are having joint problems yourself, including back problems, I highly recommend purchasing some HA for yourself at the drug store. It's not expensive -- runs about $8/bottle at Wal-Mart. You may just notice a difference in your flexibility!