[Spike]

Willy and Spike formally introduced as "Bookends" are now 10 weeks and growing nicely.These guys are from the same litter, 2 of 3 survivors of a litter of 10 born to a young 11 month momma.
We have them now about 4 weeks and they seem very happy.
They seem to enjoy each others company more than humans.
They enjoy the cuddling time we give them several times daily, but get restless except when really tired and squirm to get down after a few minutes to seek each other out

Their play together is somewhat rough typically ending in a tangled tumble with lots of growling and teeth.
They do not seem to hurt each other much and I've assumed this to be normal puppy play.

For those of you that have raised more than one at a time, do they become more people focused with time, and should I be concerned over the frequent play fighting?