I have a 5 month old female lab and two cats. We live in an apartment. I take my dog for daily walks and get her adequate exercise and give her toys to play with. At first she was chasing the cats all the time. We'll I did some training and I thought it stopped. But what I found out the other day is that she won't chase the cats when I'm around. But as soon as I leave the room it's game on and she's running after them like there's no tomorrow. What should I do as far as training to stop this? Thanks