Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose portosystemic shunts in yorkshire terriers [title] Be on the lookout for slow growth. [step] A puppy with a pss often grows less quickly and is of a smaller stance than its healthy littermates. The puppy may be poorly muscled and generally look' weedy' and underweight.

Ending1: Usually the puppy will rise up to an athletic size, have a broad chest, and exude swagger. [substeps] This breed isn't socially intelligent, as they tend to be more content when competition arises. Ending2: It may also have a lack of muscle coordination. Increase your dog's mobility skills by giving him opportunities to run and explore. Ending3: [substeps] However, it can be difficult for an owner to recognize the puppy is stunted if it is an only dog. [title] Keep an eye out for the neurological signs of the disease. Ending4: [title] Watch for any signs of breed-specific shunts in your puppy. [step] This does not mean he is out of shape, it means he is overweight.

Answer format: ending1/ending2/ending3/ending4