lame
No!
In England we call it 'cocking' their leg.
Take it to the vet
Sure.
Generally speaking: no. However, a broken leg requires veterinary care as soon as possible.
jackhammer it in the face
to the VET'S OFFICE!
Take it to the vet.
Call your veterinarian
Take it to the vet pet the dog alot and give it care.
It depends on the severity of the break.
Some crutches help a person with a broken leg walk.