We have a 3 yo collie/whippet x rescue ,had her about 18 months.She is still a nervous dog, but with time and patience, she is miles better to live with, very inteligent and loving, loves to herd people or dogs,at hyper whippet speed,for hours,then can sleep all day long.
Recall was a big issue, she isn’t food or toy driven when outside, but over time, in safe envoirments with friendly playfull dogs, recall is pretty much sorted, she still has her moments, will easily sprint off if she spots another dog,on a beach and off its lead.For a game of chase, but if the dog is too boring for her she will trot back to report.
Keep an eye on his back teeth, need to clean them weekly, they also have super cheesy feet👍🏼