5. Whimpering and whining can surely break your heart.

Anytime you hear an animal crying, it is a sign of distress. They may not attack you, but something is definitely wrong. When you hear a dog whining or whimpering, it could just break your heart. Some dogs happen to remain quiet when they are hurting. However, other dogs, especially young ones who have not experienced physical discomfort before, may whimper and cry when feeling pain. Your presence may provide some comfort and lead them to stop whining, but it does not mean they are no longer hurting. If your dog has just had surgery and is whimpering, make sure you’re giving them the correct amount of pain medication (via The Spruce Pets).
Is there no apparent reason why your pup is crying out? Then you should seek a vet’s attention immediately. There are many causes for your pets to be in pain, and some can be quite serious. The same goes for if your cat is in the same position with making those sounds. Perhaps they have a fractured bone, or painful tumor, or an underlying condition that needs surgery.