I have 3 dogs (all rescues). The first I've had since he was a tiny puppy who is now an 8 lb, thirteen-and-a-half-year old Pomeranian who has lived for the last 3.5 years on 5 different medications BID for a severe heart murmur and an enlarged heart. He has improved bowel movements (firmer and fewer). I also have a 6-year-old Papillon mix who also has improved bowel movements (firmer and fewer), which may be what has helped slow down how much she "scoots" to relieve her anal glands. Finally, I have a 1-year-old long-hair chihuahua mix (?) with the same result as the other two. I hope that the Pomeranian's fur will come back a bit on the formula because with all the medication he is on, it has grown very thin and wispy - totally unlike his former full mop which was beautiful! The other 2 have wonderful silky fur to begin with so I don't imagine that will be any different. My 6-year-old Pap mix (or possibly a CHION) who I rescued just a few months ago also seems likely to need dental work in the near future, so I hope her general health will be strong to be able to tolerate the procedure well. The rescued puppy l-h Chi mix truthfully doesn't need ANY more energy as she already has a ton of that!
As for recommending to a friend, I will wait to see if there is more that this product does that I could say about it before I would suggest purchasing since it is quite expensive.
Bottom Line: No, I would not recommend this to a friend