It just started about 3 hours ago but when my dog is laying down on the bed or on my lap and when I pick him up to move him he whines a little and he slightly hunches his back but he can get down the bed and walk just fine? He had problems with his neck (slip disk) and had to take medication for it but that was last year could that be it? He's 7 years old and is a chihuahua mix and I can't take him to the vet till Wednesday or Friday so I'm really hoping it doesn't get worse.