1. I think your dogs have been spending too much time with your parrots. :D

My Ladybug used to user her teeth in the most delicate manner--she'd use them like a seam-ripper to open up just the seam of her dog toys, and extract the stuffing. She'd spend an hour doing nothing but that.

2. Yeah. Weird. Unless maybe the nettles don't work on dogs like they do on people.