After an early morning walk Bleb started to shake his head and squeal with pain!
I phoned an emergency vet and described the symptoms. She thought he might have a grass seed in his ear and advised us to keep an eye on him throughout the day and to call back if he didn't get any better.
By this evening he was more like his usual self so we took him for an evening walk and enjoyed the dying heat of the day!
Phew,...in more ways than one!