hey everyone i currently have a cat and my friend decided she couldnt keep her newly aquired cat, which is about 5-7months old. i decided to take the cat in. i did not excpect what happened tonight. both cats were fighting like crazy. they had to be seperated into diff rooms. the 2 rooms have a glass door so they can see each other and theyre fighting through the glass. hissing and swipping. is this normal for 2 cats when they first meet? is there any hope? btw they are both femals. TIA