Hi Dr. Gabby, Thanks for your prompt response. The only new treat we gave him was a raw hide stick last weekend, and a puppy beef jerky treat from Petco. He was tested about 2 months ago for worms and he came up completely negative. He received all of the puppy vaccinations as well. He's had mucous in his stool for about 3 days now.
This was very helpful!
Thanks so much Dr. Gabby