yea I spoke to a mate on the phone and he said it didn't sound like lepto, dogs are jabbed, wormed and what ever else is all up to date, there's no signs of grass in the bile, she's hardly drinking any water but she's not dehydrated.have a read here mate : http://www.petmd.com/dog/conditions/digestive/c_dg_bilious_vomiting_syndrome#.UU7GKDdKZSQ
just had a little read, cheers bud.