Thank you all for the responses and experiences. I have not found a surgeon who is overly concerned about the MGUS but was suggested that when doing the hip the posterior approach may be better than anterior to fully view the bone health and make appropriate adjustments if needed. Being a very active person with many animals the longer recovery is not ideal but may be wiser. In any case, MGUS is always in the back of my mind when thinking about any major surgery. I wish you all the best.