On September 24th, a vaccine was logged twice for the same dog: once from an iPhone, once from the website, by two people on the same kennel account, neither aware the other had already done it. Nothing on screen made it visible coming — the carnet never said who had written what.

What changes for you

What others see

Exactly that, and that is the point: every kennel member sees who added or edited an entry, not just the owner. That is what would have made the September 24th duplicate visible before it happened.

What this does not do

These are not "not yet"s: a carnet that could block or erase would no longer be the same carnet.

The choice made against the obvious

We could have prevented the double entry instead of showing it — a warning, or a refusal, as soon as a similar fact already exists. That is not what was built: the carnet stays a record of declared facts, never an arbiter of what counts as "too many." It is for the musher to see it and judge it, not for the app to decide on their behalf that an entry should not exist.