How many?

According to factoidz 1,012,472 animals were used in research laboratories in 2006, this number did NOT include mice rats, and birds.

Although I had thought that AWA covered them all, factoidz says no.

Factoids also says the 2 biggest funders for this are the National Institute of Health and the Department of Defense.

http://factoidz.com/animal-experimentation-is-it-really-neccessary

I have heard that universities use animals. and that cosmetic companies do too.

I don't know if religion is doing it's job. I thought the idea of religion was to make people more compassionate. Guess I was wrong; it often seems to make people angrier and less tolerant.

Look where these breeders/dealers are: in the bible belt.
http://www.okpuppymilltruth.org/comparison.php

(you might want to look up you know which kennel club here too)

I thought that animals were only supposed to be used once, for one experiment, then found homes for - but without positive ID, those animals can be sold down the river again and again.

What? You think that the sort of person who sells dogs and cats into torture, wont re-use them?

This is a different civilization than what it was. It is harder to hide things, now that there is an internet. I think it would be best for this sort of thing to be more transparent.

There are people who would adopt a used animal after it has been experimented on - what was the survival rate for dogs?

And the companies could help by directing breeders to only produce dogs that would be re-home-able.

As for completely shutting down such things - you just about have to find an alternative first.