From The Pet Wiki
- Lice - There are 2 types, biting lice and sucking lice, neither of which spread to cats or humans. Check with your vet as to treatment.
- Fleas - Fleas can cause skin irritation and sometimes allergic reactions in dogs. They can also act as intermediaries for other parasites such as tapeworms. Today there are many products available to ensure your dog will be flea-free.
- Ticks - The tick, related to the spider, sticks its mouth through the skin of the dog and sucks its blood. Ticks carry Lyme Disease, Rocky Mountain Spotted Fever and diseases affecting blood cells such as Ehrlichiosis. As with fleas, there are products available today to kill ticks. Some are even combined with flea-killers. How to remove a tick - If possible, dab it with alcohol, wait a couple of minutes, using a tweezer, grab near the mouth and pull it off. Do not twist, pull the tick straight up. Applying an antiseptic or antibiotic ointment to the spot should prevent any infection. Ticks often feel like warts or other skin growths and nipples. Check suspected ticks with a magnifying glass. Pour 3% hydrogen peroxide on the bite area or use an eyedropper to limit bleaching the fur. Keep the peroxide away from the eyes.
- Mosquitoes - These nasty biters carry the heartworm and can transfer it to dogs. Before giving a preventive, have your dog tested for heartworm. Many of the flea and tick products also deter mosquitoes.
- Heartworms - In the US, heartworm is transmitted by mosquitoes and fleas. Your vet has products to avoid your dog getting heartworm. If you suspect an infestation, see your vet immediately. The treatment is difficult and must be administered by a vet.
- Biting and Stinging Insects - If you suspect your dog has been bitten or stung by bees, wasps, spiders, yellow jackets, etc. and shows an allergic reaction, consult your vet immediately.