I used skullcap and valeruim for Summer after her 1st disaster in the ring (piddling on judge) and at her next show she was so relaxed, that waiting in a long line up she lay down and fell sound asleep. :D
I use B-Sorb, and did notice a difference in Tia when I started using it, but it really has not made much of a difference to Summer, who is so laid back she falls over. Today, though, she did wag her tail for the 1st time while showing, but only just, so maybe......
http://www.runtimehost.co.uk/petcetera/acatalog/Digestion___Eating_Aids.htmlAlthough it comes under the heading eating aids, it does suggest that it maintains normal healthy attitude and maintains normal ring behaviour.
The other point is, I feel that the dogs get bored with us. Tia was certainly getting bored with me, and I handed her over to another breeder to show for me, very impromtu, and Tia shone, taking 1st, BOB and G1, Since then Tia has shown very well for me. Maybe try another handler, just to see......