Just a thought. Do you think a cat can get a urinary track infection through worms he has??? My cat had one dose of droncit in Nov he was all clear. In jan he started having slight blood in urine then it stopped then it just started again. Vet put him on Baytril. Now he spit up worms. Vet said yes he has worms again and to give him droncet. Seems sort of coincidental the two happening at the same time??