Brown Caterpillars

Brown Caterpillars

Observation - Brown Caterpillars - UK and Ireland. Description: Found 4 brown caterpillars in amongst rubbish collected for the compost and saved them.They are not on the leaves they came with. I get lots of these every year.Any idea what moth they are? I have kept them in a pot to raise now so would like to know what

Found 4 brown caterpillars in amongst rubbish collected for the compost and saved them.They are not on the leaves they came with. I get lots of these every year.Any idea what moth they are? I have kept them in a pot to raise now so would like to know what to feed them