They used to sample every greyhound for testing but as you say costs were prohibitive and it is now random sampling. Sometimes before a race and sometimes after as the person parading the dog could addminister something.
To ianb. It's not tracks can't afford sawdust, it does grow on trees you know, but they're not allowed to. Thanks to the enviornmentalists for that, same with dropping oil onto the track.
I would think, hope, that the finished article will look better. the girl who designed it probably isn't an artist and it would be just be a rough sketch.
When Blantyre 2 was built the starting gate was at the halway line on the straight. When Ivan Mauger visited pre-season he advised that the gate be moved back nearer turn four for the exact reasons you stated and also saving a long run to the line.