In small animals it might be common, but not so in horses. From microchipequine.com:
"Can the microchip move around or 'migrate' after it is injected?
No. Once properly installed, the chip will not migrate or move. It will be there when you need it. (A study published in the Journal of the American Veterinary Medical Association (2003 223:1316-1319) revealed that microchips implanted in the nuchal ligament did not migrate.)"
I can see why a brand might be nice for identification if that's your thing - just trying to clear things up. And I too both have been tattooed and regularly give blood... If I could exchange the pain of the tattoo with the pain of giving blood, I would do it in a heartbeat! :) But hey, to each their own
I think the important part to that statement is proper installment, I have heard from one person who had her horses done and then years later it was in a very different spot, that being said that was years ago so vets are maybe getting better at proper placement, which make it more reliable.
I am not against chips it's just the fact that a member of the public can not see it nor will all vets check for it I don't see it as being as "helpful" as a brand in the case of lost/stolen.
Sadly no matter what we do to prevent theifs no brand or chip will stop them if they want it bad enough
Until we get gps on the chip... That I may go for haha
I have read about a lot of rescues looking into freeze branding to prevent the horses they adopt out from ever ending up being slaughtered as the chip is just not reliable enough
as sadly auction workers don't care enough.
I guess I just hate the feeling of that huge needle getting gabbed into my arm *shudder* I still do it though doesn't stop me just would prefer the surface pain
but like you said to each their own