Hi all this my first post, warm greetings to everyone who reads this. I hope I can get some help here! I’ve found a street cat by coincidence a year and a half ago, I’ve been taken care of him ever since trying my best to provide him with love, food on a daily basis and shelter for most of the time lately, this winter I had him stay with me inside the house because it’s freezing cold outside where he usually stays at night when it’s warm in the spring and summer time.. I haven’t fully adopted him to be honest but he’s always around my house and backyard when he’s outside plus I have a sister that has phobia from cats and dogs probably animals in general and she freaks out whenever he moves! which makes it hard to keep him inside all the time, but I care a lot about him and his well being. For the past week he’s been acting differently not as usual, where he eats and lays down by my side or in his bed and sleeps or just chill as he normally is, for the past week he’s been going under the dining table and jumps on the chairs and holds the table cloth and bites on it then runs to the couch scratches a bit and his head is constantly moving like he’s looking for something and he gets into these haunting positions as if he’s ready to jump on a prey, he’s just all over the place, he goes into this mode for some time then cools down and gets back to normal, I believe something is off, I want to help him he’s been with me through a lot of tough times I’ve had, he’s been a very loyal and protective friend always a joy to see him, and I want to repay him. If anyone went through such behavior with their cat please enlighten me!