This is sooo common and I never know what to say to the stores. I mean, how to say it POLITELY without putting someone on the defensive. Sometimes I'll play dumb and say something like "Isn't it stressful for different species to be housed together?" or feigning surprise, "Oh, I don't think that's what they're supposed to be eating."

It's completely bizarre that they would "come in like that." Are suppliers really that dumb?

I'm definitely curious to see how others might word it in a friendly non-offensive way.