Went to visit a 9 month old whippet - is this normal?

my husband and I just went to see an (experienced and well known) breeder in the possibility of adopting a 9 month old whippet male and we had the weirdest experience.

We already have an Italian greyhound and know that whippets and greyhounds can be shy but this particular dog was so extremely skittish, we sat across the room calmly, trying to offer treats from a distance and the pup stopped taking treats and would growl and bark at us after 30 minutes of calmly sitting. any small noise, the pup would jump out of fear and laid at the breeders feet - we decided that he likely wasn’t the right fit for us.

we realize that this breed does require socialization so we’ve socialized our Italian greyhound very well but is this a common experience? it just felt very off.

this is the first whippet we’ve seen in person and it was a little disheartening - from reading online it’s not across all whippets. any advice?

would getting a young puppy help? we spend a lot of time with all of our pets and all are extremely happy, social and loving.