How long does a puppy’s hairline fracture take to heal?

How long a puppy’s hairline fracture takes to heal depends on the degree of damage. If the crack is mild with no bone displacement, adding nutrition and calcium and limiting activity can let the puppy recover in about a month with good care. Because bone problems are hard to judge by eye, take the puppy to a veterinary hospital for a check and care under the vet’s guidance; severe bone damage may need surgical treatment.