SuzMe: I don't have a dog. I've been dogless for 10 years now. I was talking about other people's dogs. We live on a dead end road, so everybody likes to go walking on our road. I have also been bit by a dog. Had a GS latch himself onto my butt when I was a teen ager, and walk me all the way up to his front door, with teeth firmly embedded into the pocket of my jeans. My son might as well have been wearing a sign on his hind side that said "bite me!" At one time, he had to have a series of rabies shots b/c a collarless dog ran out of the woods and bit him, only to disappear again, never to be seen. The ER doc had the B***s to suggest that it wasn't worth treating for rabies, as there had yet to be any cases reported in our county that year, and the treatment "is expensive". A family Doc friend was appaled at such an approach. In spite of these issues with dogs, I love dogs... except for GS!
Quail Trail: If I were you, I wouldn't treat for mites/lice unless you see something that needs to be treated. Why expose the girls to any thing unless there's an issue. You can do a white cloth around the ends of the perches, and inspect it in the morning for blood stains, or creepy crawlies.
I will post pics of my tractor when I get it finished. I'm also putting a pop door in the other tractor so the chicks can move from one unit to the other. They're getting crowded in the 3 x 6. I think there's 28 of them in there! As soon as they are ok to be outside without a lamp, i'll separate the pullets. They can go into the 4 x 8 space under the big girl's loft, leaving the 2 tractors for the roos.