All dogs and cats have two anal sacs under their tail (just under the skin below the anus). Anal sacs are little pea-sized pouches in small pets and grape-sized in large pets. They secrete a thin, foul-smelling material onto your pet’s feces as it defecates. This material communicates information to other animals.
When the anal sacs are agitated, full, or itchy, your pet will scoot...drag his or her butt across the floor. This looks quite amusing; however, it is usually a sign that the anal sacs need to be drained, or that there is a possible allergy.
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