Using a Leash Indoors During the Dog's Adjustment Period
For the first few days after you bring a new dog home, leave a leash attached
to the dog's buckle collar while indoors with you, so you can stop him
immediately if he starts doing something you don't want -- such as lifting his
leg, chewing on a chair leg, jumping on the couch, or showing any aggressive
signs towards anyone in the household.
Warning: Don't leave a leash attached when you're not there; the leash could
get caught on something, or chewed up. Never leave a choke collar on a dog
when indoors or out in the yard, or else he could be strangled if caught on
something like a drawer pull or fence post.
If you don't want your dog get on the furniture, use a quick leash correction
as soon as he tries to hop up and he will learn quickly. Many trainers advise
that dogs not be allowed on furniture because it can aggravate dominant
tendencies. Instead, give dogs their own comfy beds/crates to rest in.
Decide what you want to do, then all family members must abide by those
decisions. Consistency is key to training.