Thrush can be caused from a range of different organisms, of which different products may or may not work on. Heavy duty chemicals are more likely to be 'broad spectrum' but they can do further damage to frog tissue & exacerbate underlying issues that allowed the infection in. I have found t-tree oil to be a good broad spectrum antiseptic that doesn't damage live tissue.
But diet, environment & hoof form & function play a huge part in how susceptible a horse may be to infections such as this.
I've used lots of things with success in the past, antifungal cream, tea tree oil, aromafrog, white lightning, but recently I have taken to packing the grooves with ordinary table salt daily as a general routine and it has worked wonders
Different things work at different times depending if the problem is mainly fungal or bacterial, so it might be they are not a sham in the shops.
I've had varying degrees of success with Thrush Buster and Pete's Goo (50/50 mix of regular human antibiotic cream and antifungal cream applied deep into the grooves with a dental syringe). I went through a whole bottle of No Thrush seeing no difference at all, though other people swear by it.
Now that the rainy season is back I'm giving Life Data Hoof Disinfectant a go. It's a tea tree oil and tamed iodine solution.
Pick out the hoof, brush it with a stiff brush, and apply the pine tar nice and thick over the entire underside of the hoof. Then carefully set down the hoof in a pile of fresh sawdust, allow the horse to put their full weight down, and "pack" it in.
People laugh at me, but pine tar was made for hoof abcesses and thrush. It also cleanses cuts very well, but I highly recommend it for hoof care. The pine tar will suck out the crap, without drying the hoof out, and the sawdust pad will fall off after a day. Usually you only have to do it for a couple of days straight, and the thrush is gone. Provided the environment is clean, mind you...
I didn't know about the pine tar! My guy has had thrush a while now and I can't get rid of it I've also never heard about the salt. I'll have to keep all these suggestions in mind. I've used an antifungal thrush remedy that I've had a while and vinegar and neither has helped me so far. My guy has always had really good health and never really has issues so this is really bothering me!
I've had some severe cases and have tried generic thrush buster, the white powder, copper tox, and SBS thrush stop, all with little success. I'm now using Dr. Naylor's wound kote aerosol which seems to be working. I think part of the success is the ease of application and getting a thorough and penetrating coverage. I've been at it a while and seen no adverse effects.