I also know from experience that some dogs are anxious about unfamiliar objects, and this might affect their inclination to explore a bowl in an unfamiliar place. (k9magazine.com)
If your baby hasn't already started putting unfamiliar objects in his or her mouth, you'll notice it happening a lot by now. (abckidsinc.com)
These birds typically avoid unfamiliar objects and prefer items that are green and blue. (sciencemag.org)