Years ago, the wife and I lost a 3 year old dog. Not sure how he got into it, but he couldn't be saved. It's pretty much all I use.
After looking at all the local auto parts, I found some at a True Value hardware. Amazon or E-bay may carry it, I have never looked.
RV antifreeze would be better than water for storage. I also use D-Con pellets in my shop, so I don't take the dogs out with me, especially after occasionally finding pellets where I didn't put them.
