I have two large dogs and decided to set up a 100 gallon indoor pond. That is basically like a raised planter but with water and goldfish in it. I was kind of worried I would not be able to keep the dogs out of it. But after 6 months so far they have stayed out of it and not bothered the fish. The only possible issue is that they do prefer to drink that water over their water bowl. But there seem to be no ill effects and nothing in there should be dangerous to them. I have two comets and two shunbunkin goldfish. Does anyone else have dogs and fish?