One cat has died and several others have suffered similar injuries to the base of their tail or gone missing.
The dead snakes were discovered within a month of each other at Den of Maidencraig in Aberdeen.
The discoveries were made between Carstairs village and the Clyde Valley Nursing Home within a 72 hour period.
Susan Hume, 45, neglected her dog and cat by keeping them in a squalid flat.
The Scottish SPCA freed the woodland creature, which had become trapped in netting.
A Holyrood committee heard evidence over proposals to increase punishments for the worst offences.