The sweat pattern says a lot as does the temperature. When removing the saddle you have to be quick and run your hand front to back to feel for variations in heat. A warmer spot will have more heat. The middle area may be sweaty but cooler than front and back so we know there's a bit of bridging going on. [QUOTE]
Sorry but I can't agree - sweat patterns are usually a pretty poor guide to fit. For example, a horse with underdeveloped conformation behind the shoulder will generally sweat more in this area under saddle because flocking has to be either firmer or more widely spread (ie the panel area must be bigger) to provide the correct degree of support for the tree width. This doesn't necessarily mean the saddle bridges in the middle, only that the horse gets hotter under a denser or broader padded area because it's more difficult for body heat to escape.
One problem with horses is a that physical sign may have more than one cause