I don't know whether this may be co-incidence, but we used to feed our beagle bitch  on Arden Grange, then Dr John's (because we won a bag) and now we're feeding her Burn's.   She seems to have really quietened down which is really unusual for her - could this really be down to a change of food?   She's 2 1/4 years and recently finished her 3rd season.
sarah

Yes, IMO it could well be down to the food, althoug maturity may be playing a part too :)

Burns is only 18% protein, which is probably the reason she has calmed down. It had the same effect on my friends mad spaniel.

Well I fed Arden Grange alone for some years,a dn now mixed with Autarky and never made mine hyper.  Kept them in very good condition and fit and active, but not OTT.  they are exactly the same on RAW Food, which at the moment they aren't getting as I have stolen their freezer space for family use, bad mummy. :D