Hi Andrew, thank you for your reponse. The farrier has trimmed his frog and reckon we have overcome the thrush now, I was scrubbing it daily with a mild antiseptic detergent. I thought initially it was the thrush making him lame but as he is still lame after getting rid of it I can't help but think there is something else. Taz is a gelding and he is 18 years old. I have had him for nearly 6 years and he has never been lame before apart from one other occasion when the Farrier said he had thrush, but once he had cut off any excess frog Taz was fine. I have noticed on the odd occasion that he does seem sensitive when I turn him on his inside rear leg (sorry I think I said offside before). He has been like this now for several weeks with only a slight improvement. I am now at the point of getting in the Vet in but before doing so thought I would give you a try. I haven't been exercising him at all and he has been out in the field most of the time. Should I be maybe hosing with cold water for 15 minutes and walking him out?