I'd suggest quail to start, even if you don't want to shoot them. Maybe it's just because I live in the city (so pigeon scent is everywhere), but my last dog could give two hoots about pigeons, but went wild for quail scent. Just my 2 cents. That said, I got my pigeons last time with a fishing net and a headlamp under the overpass near my house. Likely illegal, so I was...... very discrete about it! lol!