Does any one know which Idexx lad Larry is based at?
Can I send blood for testing to any of the Idexx labs?

The premate tests that vets do - what readings do they go on compared to the Idexx readings?

AFAIK Larry is(or was) at the northern Idexx lab. I take my bloods to the lab near Horsham but Larry phones me with the results.

It's a long time since I used the premate vet tests so can't remember but the progesterone blood test is considered more accurate.