Yes.. a problem indeed... I was by to see Dona Baily the other day... and she's been feeding them along with her birds.. reluctantly... but she's just buying more ... and sucking up the great expense..... they dug up all of her potted plantsand hanging baskets on the back porch.. gone in and tore thiings up... but their funniest michief was going to all her bird houses.. and seeing the little hole in the front for the birds... thiought what a lovely pace to nest themselves... and chewed open the openings to get inside... only to find the space too small to raise a family and went on ot another one ... to chew it open also... the holes they thought they would like to have as their home ... got chewed onto about 6" in dia... really killing the use by the small birds.. for which they were designed...