So I just read some random junk and it seems many/most of these dogs aren't even owned by the tracks, but leased/borrowed.

"McKinnon said that most of the dogs now housed at the dog track won’t become house pets. They will simply be shipped to other states to continue racing."

It's still the fact that there will be less demand, which means fewer.

I have to say though, I will be sad if that means fewer greyhounds being adopted in MA (dur to fewer being around to adopt).