Be careful if you're relying on your cat being considered as 'livestock', Jemisa.
The Wildlife and Countryside Act 1981 (which my previous link refers to) doesn't seem to offer a statutory definition of 'livestock' but it's likely that a court would rule that the definition offered by the Animals Act 1971 applies. That states the following:
“Livestock” means cattle, horses, ***, mules, hinnies, sheep, pigs, goats and poultry, and also deer not in the wild state and . . .also, while in captivity, pheasants, partridges and grouse.
So no moggies there then!
Chris