Just like humans, they can be a few days early or late either side of the 63rd day
Plus are you absolutely sure that it IS the 63rd day? Dont wish to doubt your calculations, but if there were two matings she might have taken to the second one?
Hope she whelps soon for you, the waiting is the worst bit
She was covered on 22nd February which was 9 weeks yesterday. She only got bonked once (wasn't intentional) and she is most definately in pup - she is normally a very slender whippet cross but is now huge with boobs that hang over her feet when she sits down!!
Friend has just checked her and she still isn't showing any signs. Just want it over and done with and her come out ok!! Waiting is dire!!
Father is a very nice lurcher - whippet/saluki on one side and greyhound/collie on the other. He is biscuit coloured and quite a sporty little so and so. Bit like his girlfriend really. I think the babies will be lean, mean doggie machines. Look out bunnies!!