Plz experts only.....

Solution
1. The dogs were never jealous of buck, that surprised him.

2. When the flesh covered his bones, his muscles swelled out.

3.Nig was a huge dog, although he was equally friendly.

4. Although he had never experienced love before, but this was a unique experience.

5. His face had many wounds because he had been involved in many fights.

6. He heard the call of jungle that invited him to return to the wild.

7. Buck did not like Thornton to be out of sight because he felt insecure.

8.Buck was a creature of wild though Thornton had given him a new home.