Sorry, its been years and I can't remember what to do/not do 
Mouse (11 months) didn't want his chew this morning for the first time ever. He then threw up fairly spectacularly, including lots of grass he'd eaten and undigested breakfast, at about 12.30. He seemed sorry for himself and weak for a while, then perked up and mooched around. He's just thrown up again, bile and a bit more grass (2pm).
I'm making him some boiled rice for later, more in order to get fluids into him than anything else (he likes it in water). Anything else I can do?
He was meant to be going to doggy day care tomorrow for the day, as we were having a family treat day out - not sure what to do about that
as he'd be with a few other dogs, in someone's home. No idea how to tell if its infectious or not, but am thinking should play safe, no?