Moesha, I'm really sorry about Gary. This is what I experienced w/Buddy just two weeks ago. Yes, feline leukemia is very contagious. If the cats share a litter box, drink from the same water bowl, exchange saliva through sneezing, etc., they can get it, too, so there was no option for our boys but to help them to the Bridge. Gary looked so much like the feral that I fed for years, Old Tom. He was a loner, too, but he sure sired a lot of kittens. At least now your heart will be able to rest knowing that Gary is healthy and well at the Bridge. RIP, Gary and peace to you, Moesha and Mom.