EG based antifreeze is quite toxic and attractive to children and pets. It is quite easy to add an embitterent to it, but is seldom done. I looked into this. Only a few states require it and Prestone is careful not to add it if not required. I did not get a good answer from my Wal-Mart about what they stock. Low Tox should be a good wat to go. Unfortunately, no OSH here.