In the third and final episode of the series, the team is based at Bristol University's Langford Vet Hospital.Alice Rhodes discovers that one in five cats in the UK lives in a state of long-term anxiety because they share a house with another cat- and cats would rather live alone. Alice runs a unique experiment to test different stress-busting methods in three multi-cat households. Which will work best: separate food bowls, cat toys or stress-reducing scent diffusers?Judy Puddifoot investigates the warning signs dogs give out before becoming aggressive. They follow a fairly predictable pattern but often go unnoticed by people. Judy reveals the signals to look for - and how they escalate if you ignore them.Steve Leonard looks into the latest research that suggests feeding your cat only fish-based pet foods over the long term could lead to health problems.