The dog is half Bulgarian Shepherd and half Turkish Kangal. She is 8 years old, she has had a small amount of blood in her urine since she was 2 years old, we have given her some injections but with no effect, although she hasn'd given any other signals of some sort of discomfort. Recently (maybe week and a half) she stopped eating, has a high feaver, swollen belly and she breathes heavily. She drinks a lot of wather, has a condenced saliva hanging from her mouth without falling, because it's too dense. Yesterday something started to flow from her urethra(we thought it was urine, but now we think it is pus). We have been treating her with two tipes of antibiotic for 6 days now but with no effect. What should I do?