LOL AT YOU HAVE PROBLEM WITH HOW TO TALK TO PPL BRO JUST MY THOUGHTS BUT THATS YOU...... HE'S ON SCIENCE DIET, I'VE ONLY HAD HIM 8WKS...... AS FAR AS HOW ACTIVE HE IS, HE'S ACTIVE BUT NOT OVER ACTIVE AND IT'S A CHEWER...... I HAVENT HAD PROBLEMS WITH VIRAL INFECTIONS ETC WITH THAT BEING SAID I RUN/MAINTAIN A GOOD YARD....... OH YEAH AGE IS 19MNTHS