SO it has been about two months now since I brought my new kitten home to my 2 year old cat Hollie. Since then Ivy, the kitten, has gotten alot bigger and I think she is trying to test her boundaries with Hollie. Before they would chase each other and occasionally swipe at one another but now, Ivy will tackle Hollie to the ground and they will make angry noises. I haven't heard any hissing though or grunting or growling. There has never been any blood drawn or fur flying, so I cannot tell if this is real fighting or just playing...or are they just establishing a new hierarchy. I am thinking that Ivy is challenging Hollie for her position in the home. IS this the case? Ivy is also EXTREMELY jealous of any attention that we give Hollie. Thankfully, Hollie would rather not be petted (she has always been that way) but when my boyfriend or I have the chance to pet Hollie we do, but Ivy will come running up to her and chase her away. My boyfriend said that the other day when he was petting Hollie, Ivy came up and actually bit her, not hard but enough to make her meow and run away. Does anyone have any experience with this sort of thing? SHould I just let them work it out or should I try to intervene? Please help!! Any and all advice is greatly appreciated!!