[question name="Tania"]I have an older Tennessee Walking Horse with Cushing’s disease. She has been on Cipro for some time. She foundered long before I got her, but it has become chronic. I have been able to maintain her to a point, but she is losing weight and I have a difficult time getting her to eat. She has a lump under her throatlatch that seems to change in size when I put her on Bactrim antibiotics. Is it possible she could have a systemic infection? What are the signs of goiter, and why does this seem to get smaller with the Bactrim? Is there a stronger antibiotic that I can give her that might help, something that will be OK to give with her other medications of Bute, B-12 supplements, and her Cipro?