What do we learn of buck's present condition

Having frozen his feet that past December, John walks with a slight limp. He and Buck convalesce together, both growing stronger in the beautiful, warm weather. Buck's muscles swell, and flesh returns to cover his bones. He makes friends with John Thornton's other dogs, Skeet and Nig, as they await the raft that will carry them to Dawson. Skeet is motherly and nurses Buck's wounds during his convalescence. Nig is also quite friendly. The dogs manifest no jealousy towards Buck. He is welcomed into their frolicking games. The kindness of John Thornton arises from them as well.