My yorkiepoo is 2yrs old, is a bitch. We got a kitten around 4months ago and after a while the dog was fine with the kitty. Now she sometimes turns on him. We think she was due to go in season this month but though she acts weird, no sign yet. She acts quite odd when she is due a season, messes food about, acts strange. She's never barked and is so affectionate yet now she keeps turning on kitty she also snapped at another dog also. Has anyone got any ideas on this behaviour and any advice plz?