Hi Chipy!
I don’t use GreenMin brand, but I’ve been using Chrollera supplement for my three senior dogs for over a year everyday now for the same reason you are thinking about using GreenMin. I looked at different detox products from spirulina , chrollera, GreenMin, combinations of these, and after evaluating efficacy, price, and over-all safety, I settled on chrollera for humans from VitaCost. GreenMin seems to be a very solid product, too.
As for when to give it, I think you probably don’t want to give it with a meal because it can inhibit the absorption of minerals that’s in the food which pups need. I give my pups the supplement by itself between meals.
