Teddy Bear with a Large Belly Wandering on the Road, Owner Wants to Abandon It - What Should We Do?

This teddy bear was found on the side of the road, covered in dirt and with a collar, pitifully lying on the roadside watching passersby, likely hasn't eaten for a long time, with no strength to stand up.

A volunteer took it to the hospital for an examination, and its body was healthy with no diseases. Initially, it was thought to be a stray dog, but it was later learned that the dog had an owner, an elderly couple who were very old, and couldn't take care of it due to some reasons, wanting to give it to the volunteer, but the volunteer's home already adopted many stray dogs and were quite large, so they could only bring the little guy to find its owner and persuade it, hoping its owner could accept it again.

Currently, the little guy's belly is already quite big, and it's about to give birth. We're worried that if the dog is returned to its owner, it will give birth to its newborn babies and then what to do? Will its owner throw the newborn babies into a trash can? We are very worried about this, and we don't know what to do.