... vacation. He is a year old now and a maine coon and I have known him since he was a kitten. When I brought him to my house he freaked out and wouldn't move from under the desk. I had to call my sister and have her pick him up and I drove out there a couple nights to feed him instead. He was so happy to see me when I came because he was hungry/lonely. All of a sudden when my sister got back he hissed at me for the first time and won't let me come near him. I am the only person he hisses at and he will follow me wherever I go and try to hit me when I walk past. Sometimes he will start to come near me and rub up against me but as soon as I go to pet him he hisses and is super bipolar. How do I regain his love and trust?!