I recently got a new kitten. That was a week ago, and my other cat isnt that nice. They have met a least 5 times, and my new kitten just runs up to my older cat and my older cat runs away. If my older cat enncounters my other kitten, my cat hisses at the kitten, and the kitten getts scared. How do I make them like eachother and have them meet eachother?