Mould.

One of my dogs was treated symptomatically when exhibiting extreme tremours and foaming mouth, fitting constantly.

The vet sedated her for a total of two days, 4 hours at a time, (on waking each time checked her state and sedated again if symptoms still there).

Luckily she pulled through.

When I took her in the vet suggested rat poison, I checked for any in our garden and surrounds, and could not find any. All I could think was she had been in a river after rain and we assumed maybe run off from farmland containing poisons was ingested.

After she recovered I found out my neighbour had left soup out to cool for the fridge/freezer and forgotten about it for weeks and only found the empty pan. I asked if it was mouldy, and she said very..