I'm going to be boarding my cat in September. The facility is very clean and each cat has their own inclosure and the cats don't interact with each other - they aren't let out to mingle. There is some carpeted cat furniture in the inclosure. My cat is current on her FVRCP and rabies boosters. I used to get her the feline leukemia booster but was told she doesn't need it because she never goes outside. Do you think I should get my cat the leukemia booster? If so how long does it take to kick in?