Keep the familiar bed available. A new bed can feel different underfoot, smell unfamiliar or sit in a less comfortable spot. Choosing the old one does not mean your dog is ungrateful or that they need to be placed on the new one.
Check whether the new bed is stable, easy to step onto and in a quiet place where your dog can rest undisturbed. The quiet-space article can help you choose a spot the dog actually prefers. For a dog with mobility limits, height and support may matter more than how soft it feels to you. If your dog suddenly avoids all resting spots, struggles to lie down or seems sore, ask your vet. A training guide cannot diagnose pain or make a particular bed suitable.
Let the dog inspect the new bed without being guided onto it. You can place a familiar washable blanket nearby and reward voluntary interest. Do not take away their old bed to force a choice. If they continue sleeping well on the old one, the new bed might simply not suit them. A safe, comfortable option matters more than making a purchase pay off.
Today, put the beds where the dog can choose between them and check whether the new one slips or blocks a familiar route. Watch how they rise from rest, not just which bed they select.
Sources: Dogs Trust on choosing a restful safe space, VCA on accessibility and comfort for dogs with mobility limits, VCA on recognizing pain.