
Ceejay
Anti-freeze is extremely toxic but has a sweet taste which can be attractive to animals. I remember hearing on the news recently of someone being jailed after putting a small amount of anti-freeze in a work colleague's coke as a 'joke'. The colleague almost died and has been left requiring 24 hour care for life following this 'joke' :( Definitely something to be careful of!
I don't stress too much about my dogs drinking out of puddles in areas where there is no vehicular traffic. After all, I put fresh bowls of water down for them several times a day and they will still choose to drink rainwater out of a dirty bucket at the bottom of the garden

I do carry a bottle of fresh water but often they will show no interest in it and moments later they'll be slurping from a puddle instead :rolleyes: Besides, they both love swimming so they are naturally going to ingest some amount of water whilst swimming in lakes/rivers. Their vaccinations are up to date and they are wormed regularly. Like someone else said, if you stressed about every thing that carried a risk, you'd never get out of bed :)