Never heard of trail but found this link

http://www.petedge.com/catalog/product.jsp?productId=43406&cm_mmc=Google-_-Pet%20Supplies%20PLA_Pet%20Supplies%20Clean%20up-_-{creative}-_-Pet%20Supplies%20Clean%20up_Exact&gclid=CPzW-4H91rYCFcIv4AodyQkAwA

I've been using Trail since the late 70's. I was in my vet's office one day and asked what smelled so good. I've used it ever since. I also put some in a spray bottle (diluted) for indoors. When I use my steam mop I often put a capfull in the water dispenser. Love this stuff!!