I am working with a Peruvian Paso, and she is really skinny, she was starved and abused, o she was rescued. But she looks odd. She is 13, and missing a lot of muscle. Is there anyway to get muscle back on them?
Oh, OK. A number of things could be going on besides her needing to just get fitter. She could have something out in shoulder, back, hips, feet, or such which is causing her not to use herself properly, so muscles have atrophied, she could be under low grade chronic stress - physical or mental, could be from pain, ulcers, metabolic issues... which has caused the muscles to be wasted/undeveloped - cortisol enables the body to take whatever it needs from muscles for instant action to escape danger. Could be insulin resistance, cushings or such, which has caused muscle wastage. I'd be inclined to get a good veterinary chiro or other good bodyworker for a start, to rule out or hopefully treat any body issues, check your saddle fit.