We recently acquired a six month old cat (rehomed from friends who unexpectedly had to move away at short notice) and we had it at the vet for the first time today and discovered it had fleas. Lots of them.
We can't understand where they came from as it has always been indoors as not neutered. And it wasn't showing symptoms, wasn't scratching excessively or anything. But no matter. They are treated now.
But what now? Do we have to burn our house to the ground to make sure they're not in our house?
I wasn't expecting this, it's all new to me.