That's amazing! I had no idea that the growth & development was So Variable!!
Yes, pending the results of the FLV test, vet says they are both healthy. I had worried that the boy had vision & hearing pbms., but vet let me know he was OK---just due to being so very young; probably either a different (week younger) litter or the runt. Since the woman apparently moved that night, there was no way of getting back to her to try to determine the truth (real birthdate, etc.) Now, except for being much smaller than his 'sis', he's fine.
Thanks for all your info!!