my dog has not been eating much the last few days i think he's teething as he is really chewing hard on everything and when i was brushing his teeth yesterday a tooth fell out he is still very active and keeps going over to his food bowl but just looks at it i can hear his belly making noises all the time so i know it is uset he's running around playing with his toys and you can hear his tummy making noises what can i give him to settle it i'm sure it's to do with his teething