There are over 20 new killstreaks coming to Call of Duty: Ghosts—and yes, Riley, your trusty attack dog, makes an appearance. And like in a previous Call of Duty game, you can earn also Killstreaks via things other than just kills.
https://kotaku.com/thanks-call-of-duty-dog-for-brightening-up-a-mostly-d-509105422
Oh, and—no more deathstreaks, and there are also fewer air-based killstreaks.
