The charity recommends the neutering of domestic cats from four months of age, but you should seek advice from your vet for each individual cat. (cats.org.uk)
Get advice from your vet about how many calories your pet should eat every day, and check food labels to make sure you're serving portions that match those needs. (pets.webmd.com)
Because it is already hard for the dog to breathe properly, you should take advice from your vet about the most appropriate treatment. (doggytoggery.com)