Square vs Round Catfood Dishes

It may sound crazy to some, but there is a big difference!
I have been using a square dish for my little four-legged roommate and yet when she gets down to the last bits of food she cannot get the food in the corners!
I'd been planning on replacing the square one with a round one when just today I was under my kitchen sink to get at the hummingbird food to refill the outside decanter, when I came upon a round dish I had way back in there!
I replaced her dish and she is much happier and able to get at all her food without me having to finger the tidbits out of the corners!