We have pondered this question since we first started developing the PupPeePooPalace system. Personally it seems that placing the loft at the front for new puppies that are spending more time in the pa;ace makes the most sense. As the puppy gets older and is then returning to the palace mostly to eliminate then moving it to the back seems logical to me. We have also found that for puppies either bored due to the amount of time they spend in the crate while the owner is away moving the loft to the opposite end of wherever it is sometimes helps.