I'm trying to catch some but my camera is slow and Diasy's attention span is short

Plus she's black. It's so weird, she'll stretch up at the fence in the sun and you can see lots of definition, veins popping out, and she looks ripped... (I wasted 1/2 a roll of film trying to catch her doing that :roll: ) and then in the house she just looks normal. Fawns and reds seem to show their builds off well.
On to the training, I've stopped for a few days (except for some walking)until I figure out what to do. I know I need to focus on other areas, I just don't know how. I mean, how do you work a dogs back? It's not like I can put her on a row bench and say go at it.

I'm thinking that unless I get her a weight pull harness and can add some resistence in there, she'll continue on the same path. What do people do with things around the house or that I can build? I don't have room for a carpet mill.