
I have a "wee taster" who starts tasting the girls wee each morning about 7-10days before the season, when he first did it I thought how weird and it then clicked on my girls second season when he did it again that the 2 were connected, if I am planning a litter then I start the morning tissue test before they have had a wee.
Some bitches keep themselves so clean that it may only be stains on their bedding that will be seen.
When I had my first bitch in season I went nuts covering the sofa and chairs in shower curtains and throws as I was expecting all this blood as my only experience was when I had visited a school friend and their cocker was dripping blood every time she moved, thus far none of my girls have bled heavily.