I tried cortaflex HA, on my intermitantly lame mare, she just wasnt right, but not hopping, and I found it so good I started stocking it on my online shop. She has been pounded in the past, so needs the HA for her damaged joints but I have others on the original cortaflex, with the same reaction, its not cheap but its the best on the market IMO, Its the UK's number 1 joint supplement for a reason!