Hi, My dog has been showing some odd behaviour patterns the last couple of weeks & quite honestly, it's a tad scary! She's 8 months old but quite large now, about the size of a large collie. She always loves playtimes with me. We play all sorts of variable games like tug of war or (& pls don't laugh, I couldn't think of another name for it) quilt monsters! (I put my hand under the quilt & she follows it around & catches it or I wiggle my feet & she chases my toes, she loves that game!). Lately, on a few occasions, not when I'm playing with her though, she'll look at me, bark a bit, then bow down with her head to the floor, front legs apart & bottom in the air & growl very nastily & she'll launch herself at me. My partner has had to grab her in mid lunge to stop her twice now (twice in 5 minutes!). It's really frightening although I don't show her I'm scared. Is this a serious sign of aggression on her part & if so, what should I do to correct this? My instincts are telling me that I should be pinning her down & growling back at her to remind her that she's not the boss, because I'm starting to think that she believes she is the boss. I've always been the alpha male so to speak because I'm in all time & I've been her trainer, she doesn't normally have a problem taking commands from me & she's normally quite good. I don't know where this behaviour has come from & I don't know if it's serious, it certainly seems it, I know what her playful growl & playful behaviour looks like & this doesn't closely resemble it! Help - I'm scared!!!