I took Mittens again for a possible UTI the day before Thanksgiving and the vet gave me some medicine for it. Mittens was doing better until yesterday, I noticed him squatting and trying to pee. He went to the box a few times and tried, and he finally went. But, I sensed something else wrong, so I took him to the vet and she gave me antibiotics. We got home about an hour ago from being gone since yesterday, and I noticed he went about 3-4 times and pooped. But, he is still straining. And, he won't let me pick him up and he is hissing at me. Could use some good vibes...I am going to be taking him back in the morning, I just think something else is wrong with him.