I personally don´t have a big problem with lab animals being used for research(as long as they are not tortured). I can never justify using wild animals for that purpose, but i think when it comes to CB "tamed" species, there is a compromise between them and us...we feed them and care for them, and they help us. Just like with cattle...i take no pleasure with the dead of a cow...but if it serves the purpose of feeding us, it´s ok with me...mostly because we "created" cows for that purpose.
For me the key word here is compromise. Both species benefit from the arrangement(you may think the cows don´t benefit, but if you think about the "species", it´s doing VERY well).
This is a complicated debate, and i wish i could express myself as i´d like to in english...
I respect and understand the "no experimentation" opinion, i guess i just see it in a more scientific or general way, in which the important thing is the species, not the individual.