Hi maybe the waiting list is for girls or different colours?as long as he looks healthy,not bony and lethargic,his eyes and nose are clean,im sure he will be fine.The runt of the litter can often turn out to be bigger than other littermates!make sure you see the parent/s and take notice of how clean the cats living quarters are,bearing in mind the breeder cant help when one may decide to use the traygood luck.