Firstly I have to say thank you to this forum- it has saved my sanity many times over in the last 8 weeks. Seriously great advice. I have a 17 week female vizsla. We have been through some extreme sharkies and biting with several breeder calls and hours spent on this site! In the last few weeks the sharkies have definitely subsided especially in the house but we are still having some challenging behaviour outside. Like many of you, Ellie succumbs to the witching hour when she zooms/ barks etc but in the last two weeks it feels like it has taken an aggressive turn to the point where my two 12 year olds really do not want to be around her. In the evening now( and occasionally on walks ) she will suddenly get this intense frown stare; start barking and jumping up and lunging around you. But now she is adding hard biting to the list - thighs/ back of legs etc. Blood is often drawn. Even for me it is scary. She is very fast so we can't catch her in the garden for a time out which worked indoors. This is her schedule : up at 7. Walk at 7.30 for approx 30 mins ; breakfast ; nap for 1.5 hours usually; training 30 mins in garden; play ; total 1.5 hours ; sleep : rinse and repeat until 5pm. At 5 - 6 ish we do another 30 min walk ; dinner and then garden for a play. Behaviour challenges are usually on walk and evening in the garden. It's really the lunging/trying to hard bite - this does not feel like play biting( my husband actually got bitten last night for the first time) .We now have a pen in the garden which I've told the kids to get into and ignore her, but it's hard if they are not near the pen. The only other piece of info is that we are in obedience classes 2x a week and try to be really consistent in rewarding good behaviour- no forms of negative punishment have been used . Lastly while sleeping she has growled once at my daughter which she has never done -and recently started some territorial barking. I've told the kids not to pet her while she is sleeping but really want to know should I be concerned and listen to any advice. The rest of the time she is really well behaved and a super fun puppy. My guess it is arousal behaviour as she does get super stimulated in play/ walks etc, but really not sure what is best for this if it is the case. Thank you in advance for any advice offered.