Television zoologist Chris Packham has warned a rare disease affecting dogs 'will spread very quickly' across the country - as a fourth case is confirmed in Essex.
The Babesia parasite can be fatal to pets and is thought to have been picked up in a field in Harlow.
Dogs in Essex are thought to be the first in the UK to have contracted the disease, which originates in eastern and southern Europe.
The Forest Veterinary Surgery in Harlow has been treating the animals.
Zoologist and television presented Chris Packham spent a day working alongside a scientist from the University of Bristol studying the ticks in the field in Harlow.
The tick itself is also relatively new to the UK but is now finding it easier to survive over here because of milder temperatures.