"Nah," Peter scuffed his shoe in the sand, again. "Dunno if I'd be able to look after anything. Can barely look after myself half the time." He smiled weakly to show this was a joke, but... well. It was more or less true. "I'm sure your dog's real nice," he said, quickly, worried that he might have offended. "Only... well..." he shrugged awkwardly. "Bad experiences, s'all."