Yes I am 100% sure that my mini is a he:). I will ask at the animal pharmacy for vitamins tomorrow. He has clean, fresh water at any given time because I change it regulary through the day (clean water in a clean container is one of the few things I know about horses) He is not enclosed during the day, so he has access to our front yard, the back yard and that garden(it's not a garden because it has not been taken care of for a long time -it has all sorts of weeds- but I don't know how to call it)
He seems to enjoy running but he only runs when I do so I guess I will have to get used to cardio exercices.
And if he is ever to be claimed by his rightfull owner you guys can be certain that I will give him back, even if it will be heartbreaking.
Thank you again for your advices and quick responses, I will start taking care of some thing tomorrow.