hi all, can anyone help? we have a 16 week old border collie pup who has a lovely nature with people, dogs, cats etc in every way...except over her food bowl! we noticed from when we first got her that she was a bit possessive over her food bowl and would give a little growl if people touched her neck and near the bowl, but nothing too bad. then one day she snarled a bit too much at my sister as we were testing her with someone other than us (her owners), so i told her off as i dont want her to continue this behaviour...but then my trainer from puppy classes told me i shouldnt do this and that i should make it fun for people to be around her food, so instead i have been feeding her in stages - so put a bit in her bowl, let her finish and look to me for more, then put some more in and stroke her etc... she seemed to be coming on very well, but then this last week, she seems to be really growly. she hasnt gone for any of us or snapped at all, but she gives little growls if i touch her neck or face...but she lets me put my hand in her bowl and move the bowl and stuff without doing anything?? she is also a little bit like this over a couple of her chew toys, but only occaisionally... what should i do??? any advice for things i could try?? also, how long will it take to change her behaviour? i have been trying the above method for about 3 weeks now. thanks !