Blk had been throwing up for the last day or so. Mostly clear liquid, sometimes with fur in it. I thought it was a bit strange he was throwing up fur, because he's barely shedding when I brush him at the moment. Got up this morning and he had scabs on his neck. I found a flea on him this morning, just one. All the pieces fell into place. He's allergic to fleas. He's been over grooming his tummy because of this. Thing is, Blk hasn't been outside further than the balcony for months. He hasn't hasn't had fleas for I can't remember how many years. He did go to the vets for his annual check up three weeks ago at the vets though. That's quite literally the only place he's been. I've barely left the house myself in the last week or so, I've had flu. I did find one tiny scab behind an ear a week ago, but didn't think too much of it because, he a house cat who hasn't had fleas for years and he'd just had his annual all clear. Do you think I'm right to suspect he got them at the vets and if so, should I say something to them? I know we will get it back in hand. But I'm so annoyed seeing him suffer. It feels needless, we've kept the critters at bay for so long.