I watched Delaware Park's races for their last two live days. Most of the races were 5 to 7 horse fields BEFORE scratches. Almost every race had 1 to 3 scratches. It was nice weather and they have very nice purses. I was wondering the same thing - where are all the horses??
They are all running at some mythical slots track somewhere that we (or Churchill, or Delaware) needs slots to keep up with. Wait! Delaware already has slots. Ahhhh ... ummmm ... what Delaware needs now to compete is table gaming. To keep up to keep up with other slots tracks. Then the horses will come. You bet!
And maybe parimutuel wagering will follow ... maybe. (Except not at Philly Park so far, wagering down 25%.) But keep the faith.