Your pet's mental health is just as Important as yours... Some pets may exhibit particular moods which can also help vets figure out the type of sickness they're suffering from.
If your beloved pet unexpectedly hides away from you which indicates their fear of distress which should be addressed to help ensure their mental health well-being...
It is absolutely vital to keep yourself attentive of your pets behavioral changes, otherwise these might get worse and cause an irreparable damage in your relationship with them...