Hi, I am new here so I apologize for my ignorance if I don't post correctly.
With regards to pigs and leaky pond. I have some experience as a cat owner and operator and also pigs!
While I have no 1rst hand experience with it, let me pass on a friends advice.
The concept of the pigs feet acting as a "sheep's foot" has a little creedence, but the feces from the pig is the factor. One recomendation from an engineer friend is to dump a load of liquid hog manure in the pond. Said he has done it several times and it works. This of course is based on the pond being resonably well constructed in at least reasonable soil. The amount you dump in is unscientific.
New lagoons require about 6 months of loading to seal. the feces contains quite a bit of mineralized components which I assume are the major sealing components.
Don't be put off by the thouhgt of putting hog manure in your pond. In our state, one of the approved methods of closure of a manure lagoon is to quit loading with manure and allow it to turn into a pond. Seems to work well.
