Dog hair doesn’t grow continuously like human hair—it follows a cyclical pattern influenced by breed, age, health, and even the seasons. Here’s a more detailed look at each phase:

🌱 Anagen Phase (Active Growth)

• Hair follicles are actively producing new hair.
• This phase determines the length of the coat—longer anagen phases mean longer hair.
• Can last 2–6 months, depending on breed (e.g., Afghan Hounds stay in anagen longer than Bulldogs).

🔄 Catagen Phase (Transition)

• Hair growth slows down and the follicle begins to shrink.
• The hair detaches from its blood supply.
• Lasts 2–3 weeks—a brief pause before the next stage.

💤 Telogen Phase (Resting)

• Hair is dormant but still anchored in the follicle.
• No new growth occurs, but the hair remains visible.
• Can last 3–4 months, especially in older dogs or those with slower cycles.

🍂 Exogen Phase (Shedding)

• Old hair is released from the follicle and falls out.
• Makes room for new hair to begin the cycle again.
• This phase is often triggered by seasonal changes or hormonal shifts.

🧬 What Influences the Cycle?

• Genetics: Some breeds have staggered cycles, while others shed in synchronized bursts.
• Nutrition: Protein, omega-3s, and vitamins A, E, and B-complex are vital for follicle health.
• Age & Health: Puppies grow hair faster; older dogs may have prolonged telogen phases.
• Environment: Indoor dogs may shed less seasonally due to climate control.

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