i have this cat whos not really my cat, but comes and hangs in my garden and on my porch. we are great friends and he lets me pet him and carry him and hes chill with me. im just confused as to why he always hisses at me when i go outside and see him, because while he hisses he also walks to me and meows at me. is he hissing just in case i change and wanna attack him or something? hes a really nice cat in general