The photograph above clearly shows that a Size 7 gelatin capsule is dissolved rapidly by the rumen contents within 10 - 15 minutes.

Further, the rate controlling step in bioavailability of materials dosed via gelatin capsules is the nature of the material itself and not the delivery system or excepients.  The photographs are of a Torpac Gelatin Capsule removed from a fistulated cow 5, 10, and 15 minutes after placement.