Have they had any icky water lately (lake water or puddles)? Sin drank lake water once and was vomiting and had diarrhea.
Have you changed their feeding times?
I only ask because Sinister gets fed at 5am and 5pm. If I dont feed him at 5pm and say it's 6pm or 7pm he will throw up because it's been too long since he last ate.
Is that an issue?
Sinister "The Prince of Darkness" 4 yr old black male GSD 3.11.09
Draco "Dakota's Unbreakable Vow" 5.5 mth old male Dalmatian 6.30.13
Cats: Chaos, Mayhem, Monster, Wicked