The new bed matches the room perfectly. Your dog walks around it and settles on the old blanket. That first response does not tell you that the purchase is useless; the unfamiliar location, smell, surface or shape may need consideration.
Place the bed in a suitable resting area without blocking access to water, exits or familiar resources. Keep the old resting option available initially where practical. Replacing every comfortable place at once makes it harder to see what the dog actually prefers.
Let the dog investigate
Allow voluntary sniffing and approach. Do not repeatedly lift or push the dog onto the bed to demonstrate its purpose. A familiar, clean blanket may help the arrangement feel less novel if it is safe and suitable for the dog.
Watch the physical fit. Can the dog stretch, turn and enter comfortably? Does a raised edge make access awkward? Does the base slide across the floor? Check the manufacturer’s care and safety instructions, including whether any removable filling or fastener could become accessible.
For example, a dog may use the new bed after you move it away from a draughty doorway. That observation suggests something about location; it does not prove a general dislike of the material. Change one factor at a time when possible.
Look beyond the purchase
Age, mobility, temperature and individual preference can affect resting choices. If a dog suddenly avoids ordinary resting positions, struggles to settle or appears uncomfortable, seek veterinary advice. A new bed should not be used to explain away a possible health change.
Keep a short note of where and how the dog rests over several ordinary days. If the bed remains unsuitable, use the seller’s return policy where available rather than forcing the dog to accept it. The successful choice is one the animal can use comfortably, even if it is not the most photogenic corner of the room.