My cat was just diagnosed with uti. I found him the one day going to litter box,leaving litter box then returning right to litter box. He did this over and over again. So I watched more carefully and realized he wasnt peeing in box. Then he would get up on bed and dribble pee on blankets and it was sorta bloody. I took him right to vet and he had to stay the night. I was hit with a huge vet bill and continued antibiotics for weeks. They put him on special diet but my cat does not like this food and will only eat if he's hungry. He has lost alot of weight but seems to be fine otherwise. Should I be concerned with his weight lose?