Muscle atrophy describes the thinning or wasting of muscles. It is a common symptom in dogs, seen as part of many conditions.
Muscle tremors in dogs are involuntary, repetitive, rhythmic muscle movements.
Mucus in the stool is a viscous substance that lubricates feces to pass through the intestinal tract. A large quantity or frequent recurrence of mucus in the stool is uncommon for dogs warranting non urgent veterinary investigation.