I have a new 13 week old English Bulldog puppy. I am attempting to crate train her but the 1st week has been kind of rough. At night, I wake her up ever 2 hours to go outside. I carry her outside to go to the bathroom. I have a bad back and all this lifting is bothering my back. Is 13 weeks too young for her to be put on a leash? She will go out during the daytime and the evening and I can just walk with her outside and dont have to carry her. However, during the night after I put her to bed around 11:00pm-11:30pm I have to carry her outside to go to the bathroom. I will take her into the grass and she may pee pee but doesn't always pee and poop. If she doesn't do both, I keep putting her back in the grass everytime she climbs back up on our deck until she poops. All this lifting is killing my back. Is she old enough to start using a leash?