The downside to this, microchips can cause cancer in pets
Yeah, I call BS on that article. Anecdotal occurrences like those noted in the article mean nothing. And occurrence of cancer in lab animals is not the same as in normal pets.
The cancers listed in the article are extremely common in dogs, especially hermangio-carcenoma, chipped or not, so I wouldn’t jump to assume it has anything to do with chips.
We have been chipping all our dogs for years (we are dog breeders), essentially since they came out, and have not seen anything to suggest linkage with chips. (And of course, this is also no more than anecdotal either...)
My wife regularly scans veterinary publications for anything like this, that might benefit our dogs and breeding program. It hasn’t hit her radar.
In my opinion, the benefits of chipping outweigh the known possible problems right now.