My Papillon Has Diarrhea And I Have No Idea Why?

ok she poops in her keenel at least 4x a night. she is 6months old. i have another pap and she doesnt do a thing she knows to whine and she gets put outside and the puppy is potty trained she has just been having alot of accidents and idk y. she may havbe eatin sumthing idk but should i take her to the vet?