Just a side note that animals like anti-freeze.
Rats are small and like to make nests.
If you have a coolest leak, check your engine bay before starting, as this morning i popped the bonnet to fill the water to find a live rat !!!
It had chewed all my bonnet liner/sound deadening and made a nest in/around all the belts !
So half an hour later i can finally start my car to get it to the garage and get the coolant leak fixed. Just need a new bonnet deadening thingy now........