Hi,

It's just that they take a second to recogize you ---don't worry about it.

That happens all the time when Snowy is on my bed at night and all the lights are out-----when my mom comes upstairs, for a second when Snowy sees her, he barks and growls like crazy until she says,"It's just me, Snowy!" Then he calms down...he just doesn't know if its an intruder or what....same thing for you--they are just being good babies and watching out for the family!

Very common!