How do I know if dog has ear infection?

In the past hour dog cries once or so when ear touched inside. Normally is v.relaxed about her ears and cleaning etc. Norived been scratching ear alot and whines. Was groomed three weeks ago. Any ideas,should I be worried?

    How do I know if dog has ear infection?

    In the past hour dog cries once or so when ear touched inside. Normally is v.relaxed about her ears and cleaning etc. Norived been scratching ear alot and whines. Was groomed three weeks ago. Any ideas,should I be worried?...
    General Dog Discussions : How do I know if dog has ear infection?...