OK, this mornings trick was to open a capsule and dissolve it in water and syringe it into him. He wasn't so sure he liked this idea, but Lucas is a trooper, and we got it done. This way I know he got the full amount (except for the bits that leaked from his mouth )

I may also try mixing it into the pumpkin, since he likes the pumpkin, but my instincts tell me he will taste the fiber and not eat it all (this is what happened when I mixed it in canned food and when I sprinkled it on his dry food.)

Trial and error.