Had a husky that had "issues" with standard (at the time) dog food. No corn for that one. And she failed obedience class. And she was a "runner" - couldn't ever let her loose outside. Had birds, fish, cats, hamsters, gerbils. Nope - done for now.
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb