I remember the jingle slightly different than printed
I remember -

Shredded Ralston for your breakfast
Start[s] your day off SHINING BRIGHT
[Gives you lots] of cowboy energy
With a flavor that[s] just right
It's delicious and nutricious
Bite size[d] and ready to eat
So take a tip from Tom
Go and tell your Mom
Shredded Ralston
CANT BE BEAT!