I've always taken scratchings into account when determining my selections. Sometimes, when there's a late scratching it will end up meaning that one of my potential selections gets promoted to a selection.

For instance, say if part of one's system was to only consider the top 4 favourites, and then one of those initial favourites scratches. In this case, I'd have then considered the new horse that would make up the top 4 favs and then run it through my other filters to see if it qualifies.

I was wondering if this is something you guys do, or do you just leave your initial selections as they are despite any scratchings, or maybe just drop the race from consideration altogether. Just curious.