I'm bringing home a new cat later today who gets along with other cats and is up to date on shots. I plan to put him in the bathroom (the only room with a closed door) as soon as I bring him home. I'll do the scent introduction and other recommended things over the next few days. However, there is no way for me to bring him in without my cat seeing him (through the cat carrier). Is it better to sit the cat carrier down and let them see each other for a couple of minutes before I separate them?