What size collar to buy an 8 week old golden retriever?

It's impossible to give a specific collar size without knowing the puppy's exact neck circumference. However, I can give you some general guidelines and tips:

General Guidelines:

* Measure the puppy's neck: Use a soft measuring tape to get the circumference of the puppy's neck, leaving a little room for growth.

* Consider the puppy's age: An 8-week-old golden retriever is still very small, so you'll want a collar that fits comfortably but isn't too loose.

* Leave some room for growth: Puppies grow quickly, so it's best to err on the side of a slightly larger collar than one that's too small.

Collar Sizes:

* XS (extra small): Typically fits puppies with neck circumferences of 8-10 inches.

* S (small): Typically fits puppies with neck circumferences of 10-12 inches.

Tips for Choosing a Collar:

* Choose a comfortable material: Soft, flexible materials like nylon or leather are best for puppies. Avoid collars with harsh buckles or metal hardware that could irritate their skin.

* Look for adjustable collars: Adjustable collars allow you to customize the fit as the puppy grows.

* Consider a breakaway buckle: Breakaway buckles are a safety feature that allows the collar to open if the puppy gets caught on something.

* Get a collar that's appropriate for the puppy's activity level: A young golden retriever is likely to be very active, so choose a collar that's durable enough to withstand playtime and exploring.

Remember: It's always best to consult with your veterinarian or a pet supply specialist for personalized recommendations based on your puppy's individual needs.