What is the meaning of “from the boots up” and “from the mane down” in the following sentence(Source: Cowgirl Kate and Cocoa Written by Erica Silverman ),

” ‘Are you a real cowgirl?’ he asked. What is cowgirl all about., ‘I am a cowgirl from the boots up’ I’m a cowhorse, and I’m bald, bald fat,’ said he. Will you work hard every day? That was a horse raising his head high. ‘Of course,’ he said, ‘a cowhorse always does his job’, and is willing to share that message for them to understand. What did you say to the cowgirl after they found their horse? Does it

mean “I am a cowgirl with the boots up” and “I am a cowhorse with the mane down”?

And the “from” in a sentence means “with”?

Is there anything wrong with it.