When the neighbours spot you crouching down on the lawn in the rain cutting grass with scissors & ask what are you doing that for?
When you're at the greengrocers & arrive at the check-out with nothing but 2 heads of cos lettuce & one of redoak lettuce, the clerk says "someone likes salad" & you reply "yes. my guinea pigs" in all sincerity.
When you're at the shop grumbling to your companion there's no cos lettuce for the piggies, the clerk hears you & offers some discounted leftovers from the back & you reply "oh no thanks they eat people food".
.When you slice some carrot batons for the 2 boys' snack into a divided dish & the granddaughter says "grandma that's not even!" & you proceed to re-arrange them into more even piles.
I think we're all slightly deranged, but piggies will do that to you!