We are looking at an 11month old rescue lab bitch. We've been told she is basically sound in most of her behaviours but gets excited, barks and lunges at dogs, cats, squirrels etc when on lead. Off lead she is fine with other dogs and wants to play. She also pulls strongly on lead and is generally very excitable and bouncy. She's a lovely dog so can these behaviours be changed with time and training? Not had a rescue before so any advice welcome.