At the end of the day, luckily, he'd been himself, phew!! We took him to the vets anyway to get him checked over. The vet couldn't find anything serious, but just in case he'd overdone intense excersise, he was given some agility days off, and for 5 days, some anti-inflamatory steriods tablets.
He is acting fine today, MOST LUCKILY, but still seems a little confuzed of why he can't play play play! I took him for a gentle little walk (at first he was unenthusiastic but got into the swing of things after about 1 min and a half luckily) and we have gently trained, and played fun, but very gentle stimulation games.
Anything for Earl's health.
Earl and I.