I don’t know if anyone has had success scanning their pet with a Proxmark3. I tried one of our dogs, and can find nothing, but then for all I know her chip is buried too deep these days (she eats well).
Has anyone succeeded in doing this (with the stock antenna?)
I am tempted to make a pair of ferrite core antennae, one tuned to 125KHz and the other to 134KHz, and see if that works any better.
For me, I at the time used my diy antenna (which is just terrible, highly recommend the one sold on dangerous things for the pm3 rdv4). But also, in my case, I could feel the chip, lined it up with my antenna and then could read it. No chance of just randomly scanning it with this antenna design.