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  • Colchicine is given by mouth and is used off label in dogs and birds, primarily to treat amyloidosis and Shar-Pei fever. Its use in veterinary medicine is largely experimental and its effectiveness has not been well documented. Give as directed by your veterinarian.

  • Colitis refers to inflammation of the large intestine (colon). Colitis most commonly describes diarrhea or loose stools associated with the large bowel. Large bowel diarrhea is another term for colitis. This handout discusses signs, causes, diagnosis, and treatment.

  • Collars and harnesses can be used to contain dogs properly and can enhance the training process. Choosing the right collar or harness for a dog is important. Correct selection, fit, and use are crucial for any training tool's success.

  • Collies are medium-to-large herding dogs originally developed for herding livestock. They are known for their intelligence, loyalty, gentle temperament, and strong connection with their families. They are typically responsive and attentive, making them well suited for companionship and training.

  • Collie eye anomaly (CEA), also called “collie eye defect,” is an inherited, developmental disease in dogs in which there is a mutation of the gene that determines the development of the eye. This mutation results in defects of many layers of the back of the eye. The most common sign of CEA is blindness.

  • Colloidal oatmeal topical (brand name DermAllay®, Epi-Soothe, others) is an anti-inflammatory, antipruritic (anti-itching), and emollient (softening, soothing) agent used in the treatment of surface skin disorders and skin reactions in cats and dogs. It is made from oat grains (Avena sativa). Colloidal oatmeal topical comes in spray, cream rinse, and shampoo forms.

  • Colloidal silver (VetraSeb™ Silver) is a solution (mixture) of nanoparticles of silver. It is used by some as a possible natural alternative to antibiotics for fighting infections, including bacterial, fungal, and viral infections in dogs, cats, and horses.

  • Color dilution alopecia (CDA) is a genetic, recessive, inherited condition that causes patches of hair thinning or loss and may also include flaky and/or itchy skin. Some dogs will also be affected by secondary bacterial infections so topical management and pruritus treatments may be needed to improve the dog's comfort. Affected dogs and their relatives should not be bred.

  • Colostrum is the antibody-rich fluid produced by the mother's mammary glands in the first few days after birth. Colostrum is used as a supplement in all ages and species of animals to support the immune system. It may also be used as a local anti-inflammatory in the intestinal tract when ingested or on the skin when applied topically.

  • This article discusses some common over-the-counter medications and supplements that are toxic for dogs, including pain medications, decongestants, vitamins, and herbal remedies. Symptoms depend on the type and quantity of toxin ingested. Early intervention is key to successful treatment.