Mommy, why don't we get a cow?

Does anyone have a good answer for a question of this sort?
Neither was I prepared to the argument that followed: "We have a garden and a little shed. We can get up in the morning, milk the cow, like this..." at this point came some serious visualisations from A. and D.

The kids saw the first cows at the Roskilde Dyrskue, one of the biggest farm fairs in Northern Europe, which was an experience in itself. Danish Arla was rather inventive at their exhibition, allowing the kids not only hug the calves, but also to milk a fake cow.

Being a reasonable full-time working mom
I understand that a cow in the backyard is a no go.
Being an unreasonably loving mom I decided to figure out how we can have a cow.

Denmark has surprised me quite a lot and still keeps surprising me. Apparently, you can be a cow owner without being a farmer. It is enough to join an organisation with a mysterious name "grass cow union." Basically, you join the union, pay a membership fee, indicate in a joint calendar your availability when your family can come and make sure that the cows have access to fresh water and are doing well, and you can have your own cow.

I was utterly impressed how many cow unions exist across the country.
A new season has started in March and we would have to attend to the cows only 4 times until the end of the season. The only reservation I have is that in autumn the cows will be slaughtered: without stress, while chewing on an apple, but they all will be shot in their heads. The meat will be divided between the members of the union....I am not prepared to eat a part of our family's "Maren malkeko," (Danes also name their cows and the most typical name is Maren). 
Otherwise, the answer is: "yes,we can have a cow."