Bumps on back

Woke up this morning to raised bumps on my dobies back. They are harder to the touch. Skin does not appear to be irritated or red or broken anywhere on bumps. Anyone have any idea what this could be?

Woke up this morning to raised bumps on my dobies back. They are harder to the touch. Skin does not appear to be irritated or red or broken anywhere on bumps. Anyone have any idea what this could be?