I had a stray cat follow me home a month and a half ago. Leo a one year old gray tabby, followed my husband and I home. We thought he may be someone else's cat so we even crossed the street and he followed us across the street, and all the home and into our house. Leo was affectionate, a lap cat and very pleasant. I took Leo ti the vet and he got his first round of shots, test for FIV, and lukeimia, all negative. He had no microchip, no fleas, is unneutered, he only had an ear infection. I had walked him to the vet in a pet stroller and he loved it. He hated me putting in the ear drops but dealt with it he was ok. He was still happy eating, drinking only milk at first no water. He was using litter box wuthin 1-2 days, I showed him how ti use litter box. Then he stopped the milk was eating wet dry food and water from a tea cup haha. We have had him for a month and a half now. About a few weeks ago he started howling, yowling, and crying, then he urine marked twice, started spraying all around the house. The crying was so loud we keep him in bathroom at night. He was fine after that too. Then he bit and scratched me very hard. He bit my husband a couple days later, he was a bit iut of control. Even howling, crying, spraying alk day and night. I had set a day to get him neutered then had to cancel because couldnt afford it. I got Petsmart pet insurance but had to pay $50 for medicine, just didnt have the money. One day he sprayed 7 times in the house and I have a small efficency and just decided to let him outside. He returned the next day and was fine. I brought s spray called Kids-N- Pets to elliminate spray and urine markings and sprayed where he had urine marked and sprayed and then sprayed it all over the apartment. He didnt spray or urine mark again and hasn't done it again. Anytime he cried loud at night we tried to ignore but we were losing sleep and exhausted. So now at night if he cries to go out we let him out and he returns every morning crying at the door. So things are pretty good, but he now has fleas we got a flea collar doesn't seem to work completly yet he still has some flead. How long should it take for a flea collar to work, I got it on last Saturday. He was also wanting to go out during the day. Then we brought a harness and leash on Saturday our cat was in his pet stroller. We put the flea collar on, and harness leash. He got off leash / harness in parking lot and jumped on cars then hid under a car. I got Lei out and in the car. Then my husband put the harness and leash on him. We took Leo to a park and he loved it. Leo even got in different trees, he had a lot of fun. After having fun at the park leo didn't want to go outside during the day at all only at night. There are a couple if other stray or feral cats out there and they were even coming to our front and sliding glass door. I suspected one of these cats were in heat when he started spraying or it was just a territorial thing. So now things are almost pretty good no spraying, crying yowling. Only a few fleas only going out at night, no problem for us. The problem I am having now is Leo doesn't use the litter box at all. Is he going ouyside, and even though he is in the house all day is it normal for a cat not to use litter box all day and only use bathroom at night outside? I have to wait till I get money from school to get him neutered. How do I get Leo, to use litter box during the day. Is this abnormal behavior should I call the vet??