Hello & Welcome to Pet Talk !!
If the puppy is less than two months old, I think
I would feed it 3 times a day.Pup's need extra
vitamins and nutrients when they are just starting
to grow. Don't think I'd leave the food out all the
time. Also letting the pup explore other rooms
before it's potty trained is not a good idea.
Is your dog's name TORO? Good luck with the
house training !!
P.S. Please don't apologize for your english, I think
you express yourself & the problems very well !!!