I have recently become very intrested in doing some cross country with my dogs and after a quick google search it turns out the sport is called Cani X. Anyway I would love to know if any of you participate in this sport or if any of you know of a good harness for the dog for this sport. I've had a quick look online and there seem to be quite a few, I'm just not sure how to choose. What am I looking for? Is a particular shape better than others - some have thick straps all over - other have much thinner straps - am I right in thinking that thicker is better?