On a farm I lived on a few years ago Bob the Silkie Roo disappeared for three days after a bratty little child had visited and done a little tour on her own.

. We
finally finally finally found him.....Bob,dear Bob. On the third day we kept hearing a distant crowing when we were inside the barn...like he was stuck inside the walls or something. We searched every square inch of that barn. Stumped, we were.
Then there was a staring at something. And then a slow-motion dawning of realization as one of us walked over to the overturned galvanized metal bucket sitting there.....and kicked it over. Out came Bob. He looked a bit like one of BK's birds after 'the chicken holocaust'. 3 days.
Bob just walked past the water to the grain and started eating..and eating eating.....ignoring the water for some time. The only silkie I ever knew up close. His girlfriend, one of the 25 sex-links we had, was overjoyed to see him again. (A dog finally got Bob. We all missed him, especially his girlfriend. But he didn't die of dehydration.)
Disclaimer: Do not attempt to simulate this at home.