The Spinone Italiano experiences a prolonged growth phase compared to many breeds, with physical maturity often not fully reached until eighteen to twenty-four months of age. During the juvenile period, which spans roughly from three months to about a year, owners will witness dramatic changes in size, proportion, and coordination. The gangly, somewhat awkward appearance of a growing Spinone is entirely normal, as legs, ears, and body length often seem to develop at different rates before everything comes together.
Weight gain during this phase should be steady but controlled. Rapid weight gain in a large-breed puppy places excessive stress on developing joints and growth plates, increasing the risk of orthopedic problems later in life. Regular weigh-ins every two to three weeks help monitor progress, and any sudden spikes or plateaus in growth should be discussed with a veterinarian familiar with the breed.
The Spinone's signature wiry coat begins to take on its adult texture during the juvenile months. The soft puppy fuzz gradually gives way to a denser, rougher outer coat, and the characteristic facial furnishings — the bushy eyebrows and beard — become more defined. This coat transition may create an uneven, scruffy appearance for a period, which is perfectly normal and part of the breed's charm.
Bone and joint development is a particular concern during this phase. The growth plates in a Spinone Italiano do not fully close until well into the second year of life, making the juvenile skeleton vulnerable to injury from high-impact activities. Jumping from heights, running on hard surfaces for extended periods, and rough play with much larger dogs should all be moderated until the veterinarian confirms that growth plate closure is complete.