FWIW, I don't have any pets (and haven't for some time), but I receive physical mail regarding dog food, dog toys, etc, all the time. There's a chance you've been fooled by randomness here.
That said, there's certainly no harm in treating your device as compromised. I do the same. "Better safe than sorry."
That said, there's certainly no harm in treating your device as compromised. I do the same. "Better safe than sorry."