TODAY | April 19, 2014
>>> troubling news for pet owner. according to a new study from the nation's largest veterinary practices, deadly diseases for dogs and cats are on the rise.
>> reporter: more than 60% of u.s. households have at least one pet. for many of us, like david fein, they are part of the family.
>> he is like my child, absolutely. he is everything to me.
>> reporter: according to this new report there is discouraging news on the state of pet health. two infectious diseases affecting cats and dogs are said to be on the rise.
>> mr. mittens.
>> reporter: veterinarian says cat aids is up 30% from 2009 , primarily spread by outdoor cats, states like oklahoma, iowa and arkansas, among others, are seeing a dramatic rise.
>> unfortunately, there's no, you know, good vaccine. so annual testing to make sure your pet does not have siv and then your cat should be spayed or neutered.
>> reporter: for man's best friend a different challenge. veterinarians have seen a 21% increase in the infectious bacteria that causes lyme disease , spread by deer ticks . dogs in the northeast, states like new hampshire, massachusetts and rhode island , are among those most at risk. though dog parks can be a trouble spot for some illnesses --
>> hey, come on!
>> reporter: nina nardi says it could be lurking in your own backyard.
>> the big takeaway is just being aware of what's in, you know, your backyard. what's on the path that your dog is going to walk on.
>> reporter: vets also say animal owners should clean up after their pets and keep a close eye on any illnesses, small measures that could go a long way, keeping a loved one safe. for "today," miguel almaguer, nbc news, los angeles .