i have the last couple of days let my 6 month siamese go outside, he has not learned how to go the steps, i live on the 2nd floor...today i took him out, he went down he steps, sniffed around, and then when i went to get him to go back upstairs, he took off running...i chased him for 5 minutes until i was able to catch him...he was darting out into the parking lot, etc......any solution to this problem