Each dog is different, and our decisions are based on our experiences and beliefs. I have a vet who respects my wishes and approves of letting them have 1 or 2 seasons. Personally a silky coat is not a reason to not spay, after all mine spend most of their time wet, muddy full of all sorts of twigs, burrs etc. The only time they're not is just after I've brushed them 
Hi Holly thanks for the input certainly the same for me too as she is usually either covered in mud or sand or just plain wet!!
It's good your vet respects your wishes. It's generally something i'm considering. I was told my bitches last two sessons were phamton but i realy don't believe that was the case as she never exhibited what you describe. Only indicator was the milk production in the first heat and the slight depression... but no hording of toys or any such thing and she would never let another dog near her for any attempted mating.
