Create a new Sub-rule to rule Seasonal Changes, titled “Summer”:

This rule has no effect unless the current Season is Summer.
Once per Season, each Active Merchant may spend any amount of Money to gain that number of Animals in their Home.

Add to the end of rule Winter:

If a Townsperson has less foodstuff (i.e. Animals, Vegetables, Meat, or any combination of them) than Humans in their Home, any Townsperson may and should reduce the number of Humans in their Home by one.
When a Townsperson dies, their Home is set to “@v”.

Add to the end of rule “Spring”:

Vegetables and Meat are perishable, and may be removed from all Townspeople’s Homes.