There are a couple different type of chips..ones that can only be scanned close to the animal. Those ones seem to be ok as said above.
Then the others..that can be tracked by satellite(spell?) These ones are showing that they can cause problems and cancer in some. I know because Hubby works in the devision that makes these chips. He doesn't work on them himself but some good friends do. And they would not put those things in any of their animals let alone people. So that tells me that there has got to be something to it...if the makers want nothing to do with these chips.
NO There are NOT going to Track Your Animals by Satellites~!!! Lets get that Straight and Up Front Right Now~!
The ONLY thing on the Satellites is Your Premises Through the Premises ID Program.~!
There is Plenty of False ideas going around the net on this chipping stuff. And Following You via the Satellites is Just Plain False~!
And One More thing:
"Placing a human microchip in a mouse is about like sticking something the size of a hot dog (perhaps larger) in a human".
These kind of lad tests are just so one sided that it isn't even funny.~!
And as Far as These Chips from the USDA they are good up to 10 FEET way l way less power then some that CAN be done from those Satellite. There are MANY many different Kinds of Chips being made.
Like the GPS and the Lo Jack car finder etc. But the ones For this NAIS Program is NOT those that Put out lots of Power~!