hi sorry 2 but in im new to harness game i have a couple ov animals and i have a 18 month old filly she 1z 3/4 track trotter and 1/4 american saddlebreed iv been jogging her for twelve weeks now and she wont show any speed what so ever will she come ov age or is that it ive breed here me self shes a buet and realy looks the part please can u help me