when did you introduce stairs to your pups...mine are 4 month and i want them to start to sleep in my room as soon as possible but it is upstairs...i have introduced them to stairs and can climp up and down them ok but i have heard someplaces that you should not let them climb up stairs much if not at all until they are full grown or like 1 year but in other sources i have heard that you should intro duce them to stairs earlier so they are use to it and as long as they arent constantly running up and down the steps and are not playing on the stairs and are calmly useing the steps then it is fine...but i do not know which one to chose because i do not want to hurt there fragile little frames