Need help with 2.5 y/o who bites when he gets frustrated

Basically my 2.5 year old bites when he gets extremely frustrated. I know it's fairly common at that age and luckily we haven't had a major, major issue with it so far, but my wife and I need to find a way to address it and prevent it in the future. It's not happening a lot, but often enough to be a problem (maybe once every week or two). It happens with his younger brother (1 y/o), which makes it that much more heartbreaking, but it's also happened with me and my wife, and once with our neighbor's daughter, who is also 2.5 years old. As far as I know, it never happened at my son's daycare this past school year. The most common scenario is that he'll be in the play room with his younger brother and they'll both grab the same toy and start yelling until the older one gets frustrated and bites the younger one. It doesn't break the skin, but it leaves a mark. One of the obvious ways we've handled it is to keep them separated when possible, like I'll keep the younger one in the kitchen with me in the morning while I'm making breakfast, but of course we can't (and don't want to) do that all the time. What should we do in the immediate aftermath? With other behavioral issues, we're both able to remain pretty calm and talk through the issue with him (my go-to parenting book so far has been "No Drama Discipline"), but this just sets both of us off and neither of us really know what to do other than yell at him for it. via /r/Parenting http://ift.tt/2tDr5fW