My best friend is working abroad for a year and I have agreed to foster her dog. We have dogs of our own, but they are small terrier types - a Maltese cross and a Poochon. This dog is a greyhound/labrador cross. Who is driving me nuts. He just hoovers up anything remotely edible - his own food is gone in seconds, then he steals our dogs' food, then the cats' (they are mightily unimpressed). He's a damn nuisance if anyone is eating (snatched a cheese and tomato sandwich out of DS's hand and swallowed it whole) and yesterday I found he'd managed to open the fridge and eat a massive chunk of Cheddar. I'm at a complete loss here. My friend feeds him custom food from tails.com (which she is having delivered here). Should I switch his food? I don't want to bother her and have her worrying, but at this rate she's going to come home to a massively fat dog. Sorry to sound so pathetic but my two just don't behave like this. He's called Arthur, btw. He's kind of adorable.