Neville's brow knit together for just a moment before he understood what the dog wanted. "Oh, sure." He dropped the bread to the floor, tossing it a little bit so it wasn't right next to him in case it was too skittish to get that close.
The more he watched though, and the closer the dog got, the more Neville's gut told him something more was going on here. He pulled his wand out and tapped it to his plate, duplicating it, then split the toast between the two, added a sausage to the new one as well and set it out on the floor. "I hope that's enough."
He then drank back what was left of his tea, configured the mug into a bowl, and filled it with an aguamenti charm and set that next to the plate too.