Every hour each stray picks a porch, weighted by how full the bowls are, eats a serving, and pays that porch 0.1% of the pot. If a cat comes to the same porch three wanders in a row, it's adopted: it stays home and pays 0.05% of the pot every hour. Rare kittens pay triple. On day 14 the porch with the most cats takes the rest. Every serving is 80% pot and 20% $PURR bought and burned.