Butter wouldn't melt!

Meet Hebe & Holly; They are dwarf lop house rabbits, older sisters who are now 6 years 4 months old. Recently I changed their food from Excel ordinary to Excel Mature Rabbit , or as I call it "older lady bunny food".
One of the ingredients of this food is Ginseng and surely it's not a coincidence that since having this food they have started to behave as if they were 2 again!
If Ginseng has that affect I may consider changing to a herbal tea with Ginseng!