It's not one of those "the more the merrier" kind of thing. You know, if taking two pills a day will get you well in 10-days, then taking 20 pills right now should make you better by tomorrow. That could work if you consider being well the same thing as dying from an overdose.
Vaccines for dogs are another case-in-point. Puppies require their shots at the appropriate time. But not yearly for the great majority of vaccines. Cat lovers are learning this the hard way. By giving their feline friends too many drops, chews or needles it can lead to vaccination-associated tumors. One exception are treatments to curb Lyme disease and kennel cough. There's a risk, though. Make sure you're aware of any bad things which could happen by over-medicating.
For example, too many Lyme disease vaccines have the potential of bringing on allergies, generalized arthritis and other immune diseases.
When your pet gets a dose of preventative, it will probably take about 2-weeks for the full effect to kick-in. And it's not the secret potion that protects your pet. The dog's system reacts by antibodies of its own to combat the shot it was given. That means giving your mutt a treatment right before they're exposed to something weird or about to head to the kennel is pretty stupid. It's a waste of preventatives.
Turns out that products sold in feed stores are not the same high quality of stuff that you'd get from the vet. Periodically you'll run across a batch that's been sitting in a warm or sunlight smothered warehouse. Bad. The potency will be lost under these conditions. The safest approach is to get it from a trusted source like a doctor.
Imagine that you are bringing home a cute, little pup from the local animal shelter. Here's the schedule you need to know, especially what shots they have already had and which ones they'll still need.
• Distemper, canine adenovirus (infectious canine hepatitis) and canine parvovirus should be given at 7-9 weeks of age, 12-13 weeks of age and at 16-18 weeks of age.
• Intranasal kennel cough (bordatella) vaccine needs to be administered at 12 and 18 weeks of age.
• Rabies virus vaccination, that's three-year rated, should come at 12-16 weeks of age.
As for adult dogs, they shouldn't be stuck any more than every 3-years. The exceptions are the ones we mentioned above.
States mostly mandate that a rabies vaccination needs to be given annually. However, there are some medicines that last around 3-years. If it's mandated that they get stuck yearly your vet will probably dole-out a thiomersal-free, non-adjuvanted vaccine.