From the first second we decide to become pet owners we need to be aware that from that point on we are responsible for their lives. That’s why we have to pay attention to all the warning signs that may indicate something is wrong with our fury friends. Always keep in mind that they can’t actually tell you when they are sick, but will often show symptoms. Some are easy to pick on, while others can easily go unnoticed. For example, if a pet develops the tendency to press its head against an object for long periods of time, it’s usually a sign that animal suffers from a serious disease.