Yep, JW, they growl and bark (kinda bark sound) and are very gritty! The big female is a bully, but the littlest male (first born, too), is scappy, and comes right back at her! LOL They are a hoot to watch. Been starting them on potty training. I take them outside, and since my prevailing winter winds are from the NW, we go to the east side of the house which, conveniently, is where the dryer vent is! So, since the temps plummeted to the low 30's and getting down to 20's at night, I turn on the dryer and "instant heat" for their potty area. So far, so good! I take all 3 out in a laundry basket, put them on the mulched area of the flower bed, and within 5 minutes, they have all peed and gone poop. How's that?! I have puppy pads in their whelping box, so that's super easy to clean up twice a day, too. They are now inside the house, because with the temps dropping, I didn't want to have to heat the dog kennel shed when I could bring them inside for "free". Female is staying until week of Christmas, so I will potty train her along the way. No bites on the two males yet. Hoping to have them gone by Thanksgiving. They will be 6 weeks this coming Sunday.