There are a lot of coyotes in San Diego County. These predators feed on just about any small animal that they can catch, including cats. Coyotes hunt primarily at night but are sometimes seen in the middle of the day. It is safest to keep cats indoors at all times. We recommend never allowing your cat to go outdoors.
Fleas are the main cause of transmission of Bartonella henselae, the bacteria that causes cat scratch disease. This bacteria can cause serious disease in people, especially those who have a weakened immune system (e.g., from AIDs or chemotherapy). Even if your cat doesn’t have fleas, it may be worthwhile to treat them with Comfortis to prevent fleas and Bartonella. This is especially important for cats who are in contact with humans with weakened immune systems.
Heartworms are parasites that are carried by mosquitoes. They migrate to the hearts and vessels of infected animals and are potentially fatal. Heartworm disease is more common in dogs than in cats. Heartworm disease is becoming more common in dogs in San Diego County. We recommend putting all cats on a heartworm preventative. Heartworm prevention is more important for outdoor cats and in areas with large numbers of mosquitoes. Heartworm prevention is very important in cats who travel outside of this area.