Explaining to Children Why They Cannot Have a Dog

It is always a complicated situation when it comes to explaining young children why they can't have something they want, no matter what it is. In my case, I live in an appartment and I still have a dog, though I have enough time to walk it in the morning and night so he could do his needs elsewhere than inside the house. In my opinion, animals are very important for children development and all that, though not always possible. I didn't have a dog when I was young, even though I always wanted one. About taking care of it, it shouldn't be the children to do most of it, as they are probably not mature enough to take care of a dog, other than giving him affection and going with their parents to walk him, but if the adults cannot take care of the dog, then it's all about explaining that dogs need especial care that they can't give at the moment.