I have a 31 year old mare (that was Pinto Horse of the Year back in her day) that was very arthritic and Acti-Flex 4000 has been magic for her. Honestly, I haven’t met anyone that has tried Acti-Flex and not considered it ‘liquid gold’. You should be proud of this product! I forgot she was in her stall one day, when I came back to the barn 1 ½ hours later, she came storming out to protest. The next thing I knew, she was leading the pack at a full gallop across my front pasture!! ‘Grandma’ was showing the young kids how it’s done!