Methodology for experimental infection with F. hepatica metacercariae

[Yazmin Alcala]

I would really appreciate if somebody could tell
me how I can infect sheep with excysted 
Fasciola hepatica metacercariae that are in solution. I 
don't want to use gel capsules since they can 
become soft because of the water.  

Is there any other methodology I could use?

Thanks in advance.
Yazmin Alcala DVM