Congrats - Munchie #2 is adorable. If he just got back from a walk, I can see why the leash might be attached for a minute or so. Otherwise, please be very careful if ever leaving a leash attached to a young pup, unless you are
right there - we've seen bad things happen to dogs here, when left unattended w/ leashes.
If you have questions about his care, please post them in the appropriate sections of the forum. I'm not really sure I understand what was wrong w/ the first Munchie, but if whatever he had was contagious - I'd certainly be concerned about this 2nd pup as well. Good luck.