Not really sure where this post needs to go, hope this is okay. Where would mineral oil be located in a grocery store? My vet said this would be something I could use if Marlee has any more constipation problems, so I wanted to get some to keep on hand. I'll probably be shopping at Walmart if anyone knows where they would keep it. (We also have Kroger, Big-Star, and I think Bi-Lo here in town)