Learn to look for subtle signs of illness, and take special note of changes in the routine and habits of your pet bird. (petpeoplesplace.com)
For example, a new baby in the home brings new sounds, smells and people, as well as changes in routine. (nevadahumanesociety.org)
Dogs and cats are easily stressed by changes in their routine, environment, or unfamiliar guests who may not know how to interact with them. (petsforpatriots.org)