Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose tapeworms in cats [title] Identify proglottids. [step] An adult tapeworm has a small head that is connected to a chain of proglottids. Proglottids are about 1/4 inch (6 mm) long.

Ending1: They are located along the length of the cat's neck. These are not painful to the cat and can be digestible as long as they are covered and contained. Ending2: Bulls can puncture these proglottids by pushing them deep in their hips. [substeps] If at all possible, administer vaccinations on your dog to help control the spread of the tapeworms. Ending3: [substeps] The proglottids are particularly active on adult french bulldogs. Your dog may or may not be showing signs of a tapeworm infestation. Ending4: Each proglottid has its own set of reproductive organs, and, when fully mature, will break off and exit your cat's body in her feces. Once in the environment, proglottids will move around by increasing and decreasing in length.

Answer format: ending1/ending2/ending3/ending4