Hi,I have a one year old BD named Weegie,Well son named him luigi but thats what i call him.Anyways, we went out of town for a couple of months and had a close friend take care of Weegie.When we got back i was told that his calcium supplement wasn't given to him the whole time we were gone.I know how important it is to them and was wondering if anybody knew how long they can go without getting it to where it is harmful.He is acting fine and eating and drinking just fine.