ive had this cat guipsy for 4 years now. she helps make my world. we used to have another one called guilpy but she died. its been a year and we decided to get guipsy a friend so last 2sday we bought an 18 month old cat. we called it luna. wen we 1st introduced them they hissed growld at each other. but 2 days after that guipsy stopped. and she wants to be its friend. but 1 wk later and luna still growls and hisses at guipsy.

how can i make luna like guipsy and so they can play together?