In exchange for his obedience to Gray Beaver, what gifts does White Fang receive?

Grey Beaver defends him against Lip-lip and the other dogs. He also provides him with meat.

White Fang was too helpless to defend himself, and it would have gone hard with him had not Grey Beaver’s foot shot out, lifting Lip-lip into the air with its violence so that he smashed down to earth a dozen feet away. This was the man-animal’s justice; and even then, in his own pitiable plight, White Fang experienced a little grateful thrill. At Grey Beaver’s heels he limped obediently through the village to the tepee. And so it came that White Fang learned that the right to punish was something the gods reserved for themselves and denied to the lesser creatures under them.

Nay, Grey Beaver himself sometimes tossed him a piece of meat, and defended him against the other dogs in the eating of it. And such a piece of meat was of value. It was worth more, in some strange way, then a dozen pieces of meat from the hand of a squaw. Grey Beaver never petted nor caressed. Perhaps it was the weight of his hand, perhaps his justice, perhaps the sheer power of him, and perhaps it was all these things that influenced White Fang; for a certain tie of attachment was forming between him and his surly lord.