Wonderful! I love to hear people quitting smoking. Luckily my dad quit a year or two ago and my Mum quit about nineteen years ago as soon as she found out that she was going to have her first baby.
Unfortunately, my Grandmum lost her battle with Lung Cancer(which also caused bone cancer) caused from smoking last year. She wasn't expected to die as soon as she did, but the fluid caused from the Chemo built up around her heart and caused a heart attack. That year leading up to her death was hard on everyone, but especially her. She left behind her two dogs, and it was so sad to see her older dog looking so lost without her.
I'd hate to see that happen to anyone, especially someone like you who has such a passion for animals.
Good luck!!