Watching one of my cats eating the bread I'd put out for the birds, that he would turn up his nose at if I offered it to him in the house, it made me wonder about your contrary cats?
Another one: I'm feeding a stray tomcat in the hope of neutering/rehoming him. I purchased some Aldi catfood for him. DP was feeding our cats and used some of the Aldi food. The cats loved it and it became kitty cocaine for a couple of days before they turned their noses up in disgust - as they had done the first time I bought it and put it down to them several months before (without it becoming kitty cocaine)!