Squishy poops

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My chin, Ripley, is a little over a year old. She has had squishy poops the past 2 days. Yesterday, I stopped all her treats (oats, apple sticks, rosehips, and hibiscus) and gave her a tiny bit of burnt toast. She may be eating/drinking a little less than normal. (She eats Mazuri pellets and grass hay with purified water) She does come out to play. Tonight, I gave her more burnt toast. Poops are still a bit squishy/sticky.
I read in another thread about giving chins 0.3ml of Pet Pectillin twice a day to help her out. Is this the next best step? Do I need to take her to the vet at this point (the weekend is coming up and I don't want an emergency visit.)