Warm neck of dogs does not indicate fever. Fever is diagnosed in dogs by measuring rectal temperature by thermometer. Any increase in normal rectal temperature that is 100.5-102.5 with other signs of illness can confirm fever.
If you are suspecting illness in your dog then you should inform what signs of illness your dog is showing? If your dog is eating and drinking normally, playing normally and not lethargic then you should not be worried. Otherwise, get help your local vet.
If you are suspecting illness in your dog then you should inform what signs of illness your dog is showing? If your dog is eating and drinking normally, playing normally and not lethargic then you should not be worried. Otherwise, get help your local vet.