Most people I have spoken to have put milk out for them before without realising. Don't worry dear, as time goes on we all learn new things about these lovely creatures. Because you soaked the bread in the milk, it probably wasn't as bad as just the milk on its own and maybe just got a bit of an upset tum. Hogs will do anything for a digestive biscuit though, probably even give you little dance as he leavesOh dear, we probably made the poor thing sick and it still came back