Cannot modify {Attributes} of wolves (tamed) + health + cannot add them to a team.
Reproduce:
Summon a tamed wolf with the following command:
/summon wolf ~ ~ ~ {Owner:"YOURNAME",Attributes:[{Name:generic.maxHealth,Base:99.0d}],Team:"randomTeam",Health:99.0f}("randomTeam" is just a example, my team is already created)
If you check with /entitydata command, you can see that nothing have changed. No team, no extra health.
I suspect that the team of the wolf is constantly set to be the same as his owner, because when you kill this wolf, the death message will be "Wolf was slain [...]", "Wolf" with the same team color than me...
"No extra health" is MC-93833
"No team": Teams aren't saved to the NBT, but you should be able to see if the mob in the team by running
or
"same team color than me": turns out, the tamed wolf looks like in the same team as the owner, but the second command lists it in the team you set it. Not sure if it's a feature, but in any case this ticket isn't good enough to describe this behavior.