Apr 26, Jack Russell Terrier Biting the Air

My 13 yr old Jack Russell Terrier is biting the air as if he is eating... only happens once in a while but it is becoming more frequent... do you have

Apr 26, Jack Russell Terrier Biting the Air
My 13 yr old Jack Russell Terrier is biting the air as if he is eating... only happens once in a while but it is becoming more frequent... do you have