Thanks for replying that is the problem we dont have the experience to regognise if it is playfull or not, hopefully it is play. Theres no blood so....
We are having a similar problem introducing our 6 month female to our new 8 week female. Like yourself we are not leaving them unsupervised. The older cat sems to be very interesed in the new one but the jumping onto and then biting is worring us (around the neck), she also continually sniffs...
